diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailView.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailView.tsx
deleted file mode 100644
index 95852e0e13c..00000000000
--- a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailView.tsx
+++ /dev/null
@@ -1,229 +0,0 @@
-import { css } from '@emotion/css';
-import { memo, useCallback, useRef } from 'react';
-
-import { DataFrame, GrafanaTheme2, SelectableValue } from '@grafana/data';
-import { Trans } from '@grafana/i18n';
-import { SceneDataQuery, VizPanel } from '@grafana/scenes';
-import { Container, ScrollContainer, useStyles2 } from '@grafana/ui';
-import { isExpressionQuery } from 'app/features/expressions/guards';
-
-import { DetailViewHeader } from './DetailViewHeader';
-import { ExpressionDetailView } from './ExpressionDetailView';
-import { PanelDataTransformationsTab, PanelDataTransformationsTabRendered } from './PanelDataTransformationsTab';
-import { QueryDetailView } from './QueryDetailView';
-import { QueryLibraryView, QueryLibraryViewRef } from './QueryLibraryView';
-import { TransformationPickerView } from './TransformationPickerView';
-import { TabId, QueryTransformItem } from './types';
-
-export interface QueryLibraryMode {
-  active: boolean;
-  mode: 'browse' | 'save';
-  currentQuery?: SceneDataQuery;
-}
-
-interface DetailViewProps {
-  selectedItem: QueryTransformItem | undefined;
-  panel: VizPanel;
-  tabs: Array<{ tabId: TabId }>;
-  onRemoveTransform?: (index: number) => void;
-  onToggleTransformVisibility?: (index: number) => void;
-  isAddingTransform?: boolean;
-  onAddTransformation?: (selectedItem: SelectableValue<string>, customOptions?: Record<string, unknown>) => void;
-  onCancelAddTransform?: () => void;
-  transformationData?: DataFrame[];
-  onGoToQueries?: () => void;
-  queryLibraryMode?: QueryLibraryMode;
-  onQueryLibrarySelect?: (query: SceneDataQuery) => void;
-  onQueryLibrarySave?: (name: string, description: string) => void;
-  onQueryLibraryClose?: () => void;
-  onOpenQueryLibrary?: (mode: 'browse' | 'save', index?: number) => void;
-  onOpenQueryInspector?: () => void;
-  isDebugMode?: boolean;
-  debugPosition?: number;
-}
-
-export const DetailView = memo(
-  ({
-    selectedItem,
-    panel,
-    tabs,
-    onRemoveTransform,
-    onToggleTransformVisibility,
-    isAddingTransform,
-    onAddTransformation,
-    onCancelAddTransform,
-    transformationData,
-    onGoToQueries,
-    queryLibraryMode,
-    onQueryLibrarySelect,
-    onQueryLibrarySave,
-    onQueryLibraryClose,
-    onOpenQueryLibrary,
-    onOpenQueryInspector,
-    isDebugMode,
-    debugPosition,
-  }: DetailViewProps) => {
-    const styles = useStyles2(getStyles);
-    const queryLibraryRef = useRef<QueryLibraryViewRef>(null);
-
-    const handleSelectQueryFromHeader = useCallback(() => {
-      queryLibraryRef.current?.selectCurrentQuery();
-    }, []);
-
-    const handleSaveQueryFromHeader = useCallback(() => {
-      queryLibraryRef.current?.saveQuery();
-    }, []);
-
-    const renderContent = useCallback(() => {
-      // Show transformation picker when in add mode
-      if (isAddingTransform && onAddTransformation && onCancelAddTransform) {
-        return (
-          <TransformationPickerView
-            data={transformationData || []}
-            onAddTransformation={onAddTransformation}
-            onCancel={onCancelAddTransform}
-            onGoToQueries={onGoToQueries}
-          />
-        );
-      }
-
-      // Show QueryLibraryView when in query library mode
-      if (queryLibraryMode?.active && onQueryLibraryClose) {
-        return (
-          <>
-            <DetailViewHeader
-              queryLibraryMode={queryLibraryMode.mode}
-              onSelectQuery={queryLibraryMode.mode === 'browse' ? handleSelectQueryFromHeader : undefined}
-              onSaveQuery={queryLibraryMode.mode === 'save' ? handleSaveQueryFromHeader : undefined}
-              onClose={onQueryLibraryClose}
-            />
-            <QueryLibraryView
-              ref={queryLibraryRef}
-              mode={queryLibraryMode.mode}
-              currentQuery={queryLibraryMode.currentQuery}
-              onSelectQuery={onQueryLibrarySelect}
-              onSaveQuery={onQueryLibrarySave}
-              onClose={onQueryLibraryClose}
-            />
-          </>
-        );
-      }
-
-      if (!selectedItem) {
-        return (
-          <div className={styles.emptyState}>
-            <p>
-              <Trans i18nKey="dashboard-scene.panel-data-pane.empty-state">
-                Select a query or transformation to edit
-              </Trans>
-            </p>
-          </div>
-        );
-      }
-
-      if (selectedItem.type === 'query') {
-        const query = selectedItem.data;
-        return (
-          <>
-            <DetailViewHeader
-              selectedItem={selectedItem}
-              panel={panel}
-              onOpenQueryLibrary={onOpenQueryLibrary}
-              onOpenQueryInspector={onOpenQueryInspector}
-            />
-            <ScrollContainer>
-              <QueryDetailView panel={panel} query={query} queryIndex={selectedItem.index} />
-            </ScrollContainer>
-          </>
-        );
-      } else if (selectedItem.type === 'expression') {
-        const data = selectedItem.data;
-        if (isExpressionQuery(data)) {
-          return (
-            <>
-              <DetailViewHeader selectedItem={selectedItem} panel={panel} onOpenQueryInspector={onOpenQueryInspector} />
-              <ScrollContainer>
-                <ExpressionDetailView panel={panel} expression={data} expressionIndex={selectedItem.index} />
-              </ScrollContainer>
-            </>
-          );
-        }
-      } else {
-        const transformsTab = tabs.find((t): t is PanelDataTransformationsTab => t.tabId === TabId.Transformations);
-        if (transformsTab) {
-          return (
-            <>
-              <DetailViewHeader
-                selectedItem={selectedItem}
-                panel={panel}
-                onRemoveTransform={onRemoveTransform}
-                onToggleTransformVisibility={onToggleTransformVisibility}
-                isDebugMode={isDebugMode}
-                debugPosition={debugPosition}
-              />
-              <ScrollContainer>
-                <Container>
-                  <PanelDataTransformationsTabRendered model={transformsTab} selectedIdx={selectedItem.index} />
-                </Container>
-              </ScrollContainer>
-            </>
-          );
-        }
-      }
-
-      return null;
-    }, [
-      isAddingTransform,
-      onAddTransformation,
-      onCancelAddTransform,
-      queryLibraryMode?.active,
-      queryLibraryMode?.mode,
-      queryLibraryMode?.currentQuery,
-      onQueryLibraryClose,
-      selectedItem,
-      transformationData,
-      onGoToQueries,
-      handleSelectQueryFromHeader,
-      handleSaveQueryFromHeader,
-      onQueryLibrarySelect,
-      onQueryLibrarySave,
-      styles.emptyState,
-      panel,
-      onOpenQueryLibrary,
-      onOpenQueryInspector,
-      tabs,
-      onRemoveTransform,
-      onToggleTransformVisibility,
-      isDebugMode,
-      debugPosition,
-    ]);
-
-    return <div className={styles.container}>{renderContent()}</div>;
-  }
-);
-
-DetailView.displayName = 'DetailView';
-
-const getStyles = (theme: GrafanaTheme2) => {
-  return {
-    container: css({
-      display: 'flex',
-      flexDirection: 'column',
-      height: '100%',
-      width: '100%',
-      background: theme.colors.background.primary,
-      border: `1px solid ${theme.colors.border.weak}`,
-      borderTopLeftRadius: theme.shape.radius.md,
-      borderTopRightRadius: theme.shape.radius.md,
-      overflow: 'hidden',
-    }),
-    emptyState: css({
-      display: 'flex',
-      alignItems: 'center',
-      justifyContent: 'center',
-      height: '100%',
-      color: theme.colors.text.secondary,
-      fontSize: theme.typography.h5.fontSize,
-    }),
-  };
-};
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataPane.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataPane.tsx
index 8fc158a684b..5cb9cd29713 100644
--- a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataPane.tsx
+++ b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataPane.tsx
@@ -1,8 +1,6 @@
-import { css, cx } from '@emotion/css';
 import { useCallback, useMemo } from 'react';
 
-import { DataTransformerConfig, GrafanaTheme2, SelectableValue } from '@grafana/data';
-import { selectors } from '@grafana/e2e-selectors';
+import { DataTransformerConfig, SelectableValue } from '@grafana/data';
 import {
   SceneComponentProps,
   SceneDataQuery,
@@ -13,7 +11,6 @@ import {
   SceneObjectUrlValues,
   VizPanel,
 } from '@grafana/scenes';
-import { useStyles2 } from '@grafana/ui';
 import { getConfig } from 'app/core/config';
 import { contextSrv } from 'app/core/services/context_srv';
 import { getRulesPermissions } from 'app/features/alerting/unified/utils/access-control';
@@ -22,11 +19,10 @@ import { ExpressionQueryType } from 'app/features/expressions/types';
 
 import { getQueryRunnerFor } from '../../utils/utils';
 
-import { DetailView, QueryLibraryMode } from './DetailView';
 import { PanelDataAlertingTab } from './PanelDataAlertingTab';
 import { PanelDataQueriesTab } from './PanelDataQueriesTab';
-import { PanelDataSidebarRendered } from './PanelDataSidebar';
 import { PanelDataTransformationsTab } from './PanelDataTransformationsTab';
+import { QueryTransformDetailView, QueryLibraryMode } from './QueryTransformDetailView';
 import { useQueryTransformItems } from './hooks';
 import { PanelDataPaneTab, TabId } from './types';
 import { isDataTransformerConfig, queryItemId, transformItemId } from './utils';
@@ -34,7 +30,6 @@ import { isDataTransformerConfig, queryItemId, transformItemId } from './utils';
 export interface PanelDataPaneState extends SceneObjectState {
   tabs: PanelDataPaneTab[];
   tab: TabId;
-  sidebarCollapsed: boolean;
   selectedQueryTransform: string | null;
   panelRef: SceneObjectRef<VizPanel>;
   transformPickerIndex?: number | null;
@@ -45,7 +40,6 @@ export interface PanelDataPaneState extends SceneObjectState {
 
 export class PanelDataPane extends SceneObjectBase<PanelDataPaneState> {
   static Component = PanelDataPaneRendered;
-  static FooterComponent = PanelDataSidebarRendered;
 
   protected _urlSync = new SceneObjectUrlSyncConfig(this, { keys: ['tab', 'selectedQueryTransform'] });
 
@@ -67,7 +61,6 @@ export class PanelDataPane extends SceneObjectBase<PanelDataPaneState> {
       panelRef,
       tabs,
       tab,
-      sidebarCollapsed: false,
       queryLibraryMode: {
         active: false,
         mode: 'browse',
@@ -86,10 +79,6 @@ export class PanelDataPane extends SceneObjectBase<PanelDataPaneState> {
     this.setState({ selectedQueryTransform: selectedId });
   };
 
-  public onCollapseSidebar = (newState: boolean) => {
-    this.setState({ sidebarCollapsed: newState });
-  };
-
   public onTransformPicker = (index?: number | null) => {
     this.setState({ transformPickerIndex: index });
   };
@@ -130,7 +119,6 @@ function PanelDataPaneRendered({ model }: SceneComponentProps<PanelDataPane>) {
     isDebugMode = false,
     debugPosition = 0,
   } = model.useState();
-  const styles = useStyles2(getStyles);
 
   // Subscribe to query runner and tab state changes
   const panel = panelRef.resolve();
@@ -325,30 +313,26 @@ function PanelDataPaneRendered({ model }: SceneComponentProps<PanelDataPane>) {
   const series = sourceData?.data?.series || [];
 
   return (
-    <div className={styles.dataPane} data-testid={selectors.components.PanelEditor.DataPane.content}>
-      <div className={cx(styles.unifiedLayout)}>
-        <DetailView
-          selectedItem={selectedItem}
-          panel={panel}
-          tabs={tabs}
-          onRemoveTransform={handleRemoveTransform}
-          onToggleTransformVisibility={handleToggleTransformVisibility}
-          isAddingTransform={transformPickerIndex != null}
-          onAddTransformation={handleAddTransform}
-          onCancelAddTransform={() => model.onTransformPicker(null)}
-          transformationData={series}
-          onGoToQueries={handleGoToQueries}
-          queryLibraryMode={queryLibraryMode}
-          onQueryLibrarySelect={handleQueryLibrarySelect}
-          onQueryLibrarySave={handleQueryLibrarySave}
-          onQueryLibraryClose={handleQueryLibraryClose}
-          onOpenQueryLibrary={handleOpenQueryLibrary}
-          onOpenQueryInspector={handleOpenQueryInspector}
-          isDebugMode={isDebugMode}
-          debugPosition={debugPosition}
-        />
-      </div>
-    </div>
+    <QueryTransformDetailView
+      selectedItem={selectedItem}
+      panel={panel}
+      tabs={tabs}
+      onRemoveTransform={handleRemoveTransform}
+      onToggleTransformVisibility={handleToggleTransformVisibility}
+      isAddingTransform={transformPickerIndex != null}
+      onAddTransformation={handleAddTransform}
+      onCancelAddTransform={() => model.onTransformPicker(null)}
+      transformationData={series}
+      onGoToQueries={handleGoToQueries}
+      queryLibraryMode={queryLibraryMode}
+      onQueryLibrarySelect={handleQueryLibrarySelect}
+      onQueryLibrarySave={handleQueryLibrarySave}
+      onQueryLibraryClose={handleQueryLibraryClose}
+      onOpenQueryLibrary={handleOpenQueryLibrary}
+      onOpenQueryInspector={handleOpenQueryInspector}
+      isDebugMode={isDebugMode}
+      debugPosition={debugPosition}
+    />
   );
 }
 
@@ -365,23 +349,3 @@ export function shouldShowAlertingTab(pluginId: string) {
 
   return isGraph || isTimeseries;
 }
-
-function getStyles(theme: GrafanaTheme2) {
-  return {
-    dataPane: css({
-      display: 'flex',
-      flexDirection: 'column',
-      flexGrow: 1,
-      minHeight: 0,
-      height: '100%',
-      width: '100%',
-      paddingLeft: theme.spacing(2),
-    }),
-    unifiedLayout: css({
-      flex: 1,
-      minHeight: 0,
-      background: theme.colors.background.primary,
-      overflow: 'hidden',
-    }),
-  };
-}
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataSidebar.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataSidebar.tsx
index d5db8402c49..872f8091266 100644
--- a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataSidebar.tsx
+++ b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataSidebar.tsx
@@ -1,5 +1,5 @@
 import { css } from '@emotion/css';
-import { useCallback, useEffect, useMemo } from 'react';
+import { Dispatch, SetStateAction, useCallback, useEffect, useMemo } from 'react';
 
 import { DataTransformerConfig, GrafanaTheme2, SelectableValue } from '@grafana/data';
 import { t } from '@grafana/i18n';
@@ -13,18 +13,35 @@ import { GRAFANA_RULES_SOURCE_NAME } from 'app/features/alerting/unified/utils/d
 import { ExpressionQueryType } from '../../../expressions/types';
 import { getQueryRunnerFor } from '../../utils/utils';
 
-import { QueryLibraryMode } from './DetailView';
 import { PanelDataPane } from './PanelDataPane';
 import { PanelDataQueriesTab } from './PanelDataQueriesTab';
 import { PanelDataTransformationsTab } from './PanelDataTransformationsTab';
+import { QueryLibraryMode } from './QueryTransformDetailView';
 import { QueryTransformList } from './QueryTransformList';
 import { useQueryTransformItems } from './hooks';
 import { TabId } from './types';
 import { isDataTransformerConfig, queryItemId, transformItemId } from './utils';
 
-export function PanelDataSidebarRendered({ model }: SceneComponentProps<PanelDataPane>) {
-  const { panelRef, tabs, selectedQueryTransform, sidebarCollapsed, transformPickerIndex } = model.useState();
-  const styles = useStyles2(getStyles, sidebarCollapsed);
+export enum SidebarSize {
+  Mini = 'mini',
+  Full = 'full',
+}
+
+export interface SidebarState {
+  size: SidebarSize;
+  collapsed: boolean;
+}
+
+export function PanelDataSidebar({
+  model,
+  sidebarState,
+  setSidebarState,
+}: SceneComponentProps<PanelDataPane> & {
+  sidebarState: SidebarState;
+  setSidebarState: Dispatch<SetStateAction<SidebarState>>;
+}) {
+  const { panelRef, tabs, selectedQueryTransform, transformPickerIndex } = model.useState();
+  const styles = useStyles2(getStyles, sidebarState);
 
   const panel = panelRef.resolve();
 
@@ -291,13 +308,13 @@ export function PanelDataSidebarRendered({ model }: SceneComponentProps<PanelDat
   // const sourceData = queryRunner?.useState();
   // const series = sourceData?.data?.series || [];
 
-  if (sidebarCollapsed) {
+  if (sidebarState.collapsed) {
     return (
       <div className={styles.sidebarPane}>
         <Button
           icon="angle-right"
           variant="secondary"
-          onClick={() => model.onCollapseSidebar(false)}
+          onClick={() => setSidebarState((prevState) => ({ ...prevState, collapsed: true }))}
           tooltip={t('app.features.dashboardScene.panelEdit.panelDataPane.expandSidebar', 'Expand sidebar')}
         />
       </div>
@@ -311,7 +328,9 @@ export function PanelDataSidebarRendered({ model }: SceneComponentProps<PanelDat
         dataSourceItems={queryExpressionItems}
         transformItems={transformItems}
         selectedId={selectedId}
-        onCollapseSidebar={() => model.onCollapseSidebar(true)}
+        sidebarSize={sidebarState.size}
+        onResizeSidebar={(size: SidebarSize) => setSidebarState((prevState) => ({ ...prevState, size }))}
+        onCollapseSidebar={() => setSidebarState((prevState) => ({ ...prevState, collapsed: true }))}
         onSelect={(id) => {
           model.onChangeSelected(id);
           model.onTransformPicker(null);
@@ -368,17 +387,24 @@ export function shouldShowAlertingTab(pluginId: string) {
   return isGraph || isTimeseries;
 }
 
-function getStyles(theme: GrafanaTheme2, collapsed: boolean) {
+function getStyles(theme: GrafanaTheme2, sidebarState: SidebarState) {
   return {
     sidebarPane: css({
       overflow: 'hidden',
       height: '100%',
-      width: collapsed ? 49 : 300,
-      padding: collapsed ? theme.spacing(1) : 'unset',
+      width: sidebarState.collapsed ? 49 : '100%',
+      padding: sidebarState.collapsed ? theme.spacing(1) : 'unset',
       borderTopRightRadius: theme.shape.radius.md,
-      borderTop: `1px solid ${theme.colors.border.weak}`,
-      borderRight: `1px solid ${theme.colors.border.weak}`,
+      border: `1px solid ${theme.colors.border.weak}`,
+      borderBottom: 'none',
       background: theme.colors.background.primary,
+      ...(sidebarState.size === SidebarSize.Mini
+        ? {
+            borderTopLeftRadius: theme.shape.radius.md,
+          }
+        : {
+            borderLeft: 'none',
+          }),
     }),
   };
 }
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailView.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailView.tsx
new file mode 100644
index 00000000000..d727ed04fa3
--- /dev/null
+++ b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailView.tsx
@@ -0,0 +1,209 @@
+import { css } from '@emotion/css';
+import { memo, useCallback, useRef } from 'react';
+
+import { DataFrame, GrafanaTheme2, SelectableValue } from '@grafana/data';
+import { selectors } from '@grafana/e2e-selectors';
+import { Trans } from '@grafana/i18n';
+import { SceneDataQuery, VizPanel } from '@grafana/scenes';
+import { Container, ScrollContainer, useStyles2 } from '@grafana/ui';
+import { isExpressionQuery } from 'app/features/expressions/guards';
+
+import { ExpressionDetailView } from './ExpressionDetailView';
+import { PanelDataTransformationsTab, PanelDataTransformationsTabRendered } from './PanelDataTransformationsTab';
+import { QueryDetailView } from './QueryDetailView';
+import { QueryLibraryView, QueryLibraryViewRef } from './QueryLibraryView';
+import { QueryTransformDetailViewHeader } from './QueryTransformDetailViewHeader';
+import { TransformationPickerView } from './TransformationPickerView';
+import { TabId, QueryTransformItem } from './types';
+
+export interface QueryLibraryMode {
+  active: boolean;
+  mode: 'browse' | 'save';
+  currentQuery?: SceneDataQuery;
+}
+
+interface QueryTransformDetailViewProps {
+  selectedItem: QueryTransformItem | undefined;
+  panel: VizPanel;
+  tabs: Array<{ tabId: TabId }>;
+  onRemoveTransform?: (index: number) => void;
+  onToggleTransformVisibility?: (index: number) => void;
+  isAddingTransform?: boolean;
+  onAddTransformation?: (selectedItem: SelectableValue<string>, customOptions?: Record<string, unknown>) => void;
+  onCancelAddTransform?: () => void;
+  transformationData?: DataFrame[];
+  onGoToQueries?: () => void;
+  queryLibraryMode?: QueryLibraryMode;
+  onQueryLibrarySelect?: (query: SceneDataQuery) => void;
+  onQueryLibrarySave?: (name: string, description: string) => void;
+  onQueryLibraryClose?: () => void;
+  onOpenQueryLibrary?: (mode: 'browse' | 'save', index?: number) => void;
+  onOpenQueryInspector?: () => void;
+  isDebugMode?: boolean;
+  debugPosition?: number;
+}
+
+const QueryTransformDetailViewContent = ({
+  selectedItem,
+  panel,
+  tabs,
+  onRemoveTransform,
+  onToggleTransformVisibility,
+  isAddingTransform,
+  onAddTransformation,
+  onCancelAddTransform,
+  transformationData,
+  onGoToQueries,
+  queryLibraryMode,
+  onQueryLibrarySelect,
+  onQueryLibrarySave,
+  onQueryLibraryClose,
+  onOpenQueryLibrary,
+  onOpenQueryInspector,
+  isDebugMode,
+  debugPosition,
+  styles,
+}: QueryTransformDetailViewProps & { styles: ReturnType<typeof getStyles> }) => {
+  const queryLibraryRef = useRef<QueryLibraryViewRef>(null);
+
+  const handleSelectQueryFromHeader = useCallback(() => {
+    queryLibraryRef.current?.selectCurrentQuery();
+  }, []);
+
+  const handleSaveQueryFromHeader = useCallback(() => {
+    queryLibraryRef.current?.saveQuery();
+  }, []);
+
+  // Show transformation picker when in add mode
+  if (isAddingTransform && onAddTransformation && onCancelAddTransform) {
+    return (
+      <TransformationPickerView
+        data={transformationData || []}
+        onAddTransformation={onAddTransformation}
+        onCancel={onCancelAddTransform}
+        onGoToQueries={onGoToQueries}
+      />
+    );
+  }
+
+  // Show QueryLibraryView when in query library mode
+  if (queryLibraryMode?.active && onQueryLibraryClose) {
+    return (
+      <>
+        <QueryTransformDetailViewHeader
+          queryLibraryMode={queryLibraryMode.mode}
+          onSelectQuery={queryLibraryMode.mode === 'browse' ? handleSelectQueryFromHeader : undefined}
+          onSaveQuery={queryLibraryMode.mode === 'save' ? handleSaveQueryFromHeader : undefined}
+          onClose={onQueryLibraryClose}
+        />
+        <QueryLibraryView
+          ref={queryLibraryRef}
+          mode={queryLibraryMode.mode}
+          currentQuery={queryLibraryMode.currentQuery}
+          onSelectQuery={onQueryLibrarySelect}
+          onSaveQuery={onQueryLibrarySave}
+          onClose={onQueryLibraryClose}
+        />
+      </>
+    );
+  }
+
+  if (!selectedItem) {
+    return (
+      <div className={styles.emptyState}>
+        <p>
+          <Trans i18nKey="dashboard-scene.panel-data-pane.empty-state">Select a query or transformation to edit</Trans>
+        </p>
+      </div>
+    );
+  }
+
+  if (selectedItem.type === 'query') {
+    const query = selectedItem.data;
+    return (
+      <>
+        <QueryTransformDetailViewHeader
+          selectedItem={selectedItem}
+          panel={panel}
+          onOpenQueryLibrary={onOpenQueryLibrary}
+          onOpenQueryInspector={onOpenQueryInspector}
+        />
+        <ScrollContainer>
+          <QueryDetailView panel={panel} query={query} queryIndex={selectedItem.index} />
+        </ScrollContainer>
+      </>
+    );
+  } else if (selectedItem.type === 'expression') {
+    const data = selectedItem.data;
+    if (isExpressionQuery(data)) {
+      return (
+        <>
+          <QueryTransformDetailViewHeader
+            selectedItem={selectedItem}
+            panel={panel}
+            onOpenQueryInspector={onOpenQueryInspector}
+          />
+          <ScrollContainer>
+            <ExpressionDetailView panel={panel} expression={data} expressionIndex={selectedItem.index} />
+          </ScrollContainer>
+        </>
+      );
+    }
+  } else {
+    const transformsTab = tabs.find((t): t is PanelDataTransformationsTab => t.tabId === TabId.Transformations);
+    if (transformsTab) {
+      return (
+        <>
+          <QueryTransformDetailViewHeader
+            selectedItem={selectedItem}
+            panel={panel}
+            onRemoveTransform={onRemoveTransform}
+            onToggleTransformVisibility={onToggleTransformVisibility}
+            isDebugMode={isDebugMode}
+            debugPosition={debugPosition}
+          />
+          <ScrollContainer>
+            <Container>
+              <PanelDataTransformationsTabRendered model={transformsTab} selectedIdx={selectedItem.index} />
+            </Container>
+          </ScrollContainer>
+        </>
+      );
+    }
+  }
+
+  return null;
+};
+
+export const QueryTransformDetailView = memo((props: QueryTransformDetailViewProps) => {
+  const styles = useStyles2(getStyles);
+  return (
+    <div className={styles.container} data-testid={selectors.components.PanelEditor.DataPane.content}>
+      <QueryTransformDetailViewContent {...props} styles={styles} />
+    </div>
+  );
+});
+
+QueryTransformDetailView.displayName = 'QueryTransformDetailView';
+
+const getStyles = (theme: GrafanaTheme2) => ({
+  container: css({
+    display: 'flex',
+    flexDirection: 'column',
+    height: '100%',
+    width: '100%',
+    background: theme.colors.background.primary,
+    border: `1px solid ${theme.colors.border.weak}`,
+    borderTopLeftRadius: theme.shape.radius.md,
+    borderTopRightRadius: theme.shape.radius.md,
+    overflow: 'hidden',
+  }),
+  emptyState: css({
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    height: '100%',
+    color: theme.colors.text.secondary,
+    fontSize: theme.typography.h5.fontSize,
+  }),
+});
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailViewHeader.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailViewHeader.tsx
similarity index 99%
rename from public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailViewHeader.tsx
rename to public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailViewHeader.tsx
index 3ff0dc109d0..e60ad134ab9 100644
--- a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/DetailViewHeader.tsx
+++ b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformDetailViewHeader.tsx
@@ -67,7 +67,7 @@ interface QueryLibraryModeProps {
   onClose: () => void;
 }
 
-type DetailViewHeaderProps = ItemModeProps | QueryLibraryModeProps;
+type QueryTransformDetailViewHeaderProps = ItemModeProps | QueryLibraryModeProps;
 
 const ITEM_CONFIG = (theme: GrafanaTheme2) => ({
   query: {
@@ -682,7 +682,7 @@ function ItemHeader({
 }
 
 // Main component that delegates to the appropriate sub-component
-export const DetailViewHeader = (props: DetailViewHeaderProps) => {
+export const QueryTransformDetailViewHeader = (props: QueryTransformDetailViewHeaderProps) => {
   if (props.queryLibraryMode) {
     return (
       <QueryLibraryHeader
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformList.tsx b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformList.tsx
index 7479fc6bb93..e7c8d2048a2 100644
--- a/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformList.tsx
+++ b/public/app/features/dashboard-scene/panel-edit/PanelDataPane/QueryTransformList.tsx
@@ -10,6 +10,7 @@ import { ExpressionQueryType } from 'app/features/expressions/types';
 import { AddDataItemMenu } from './AddDataItemMenu';
 import { AiModeCard } from './AiModeCard';
 import { ConnectionLines } from './ConnectionLines';
+import { SidebarSize } from './PanelDataSidebar';
 import { QueryTransformCard } from './QueryTransformCard';
 import { getItemHiddenState, restoreItemStates, syncItemsToDebugState } from './debugModeHelpers';
 import { usePanelDataPaneColors } from './theme';
@@ -21,6 +22,7 @@ const CARD_HEIGHT = 70;
 interface QueryTransformListProps {
   allItems: QueryTransformItem[];
   dataSourceItems: QueryItem[];
+  sidebarSize: SidebarSize;
   transformItems: TransformItem[];
   selectedId: string | null;
   onSelect: (id: string) => void;
@@ -36,6 +38,7 @@ interface QueryTransformListProps {
   onReorderDataSources?: (startIndex: number, endIndex: number) => void;
   onReorderTransforms?: (startIndex: number, endIndex: number) => void;
   onAddOrganizeFieldsTransform?: () => void;
+  onResizeSidebar: (size: SidebarSize) => void;
   onCollapseSidebar: () => void;
   onDebugStateChange?: (isDebugMode: boolean, debugPosition: number) => void;
 }
@@ -46,6 +49,7 @@ export const QueryTransformList = memo(
     transformItems,
     allItems,
     selectedId,
+    sidebarSize,
     onSelect,
     onAddQuery,
     onAddFromSavedQueries,
@@ -59,6 +63,7 @@ export const QueryTransformList = memo(
     onReorderDataSources,
     onReorderTransforms,
     onAddOrganizeFieldsTransform,
+    onResizeSidebar,
     onCollapseSidebar,
     onDebugStateChange,
   }: QueryTransformListProps) => {
@@ -353,9 +358,12 @@ export const QueryTransformList = memo(
         <div className={styles.header}>
           <Stack justifyContent="space-between" alignItems="center" gap={2}>
             {/* eslint-disable-next-line jsx-a11y/click-events-have-key-events, jsx-a11y/no-static-element-interactions */}
-            <div className={styles.headerTitle} onClick={onCollapseSidebar}>
+            <div
+              className={styles.headerTitle}
+              onClick={() => onResizeSidebar(sidebarSize === SidebarSize.Mini ? SidebarSize.Full : SidebarSize.Mini)}
+            >
               <Stack direction="row" alignItems="center" gap={1}>
-                <Icon name="angle-down" />
+                <Icon name={sidebarSize === SidebarSize.Mini ? 'expand-arrows' : 'compress-arrows'} />
                 <span>{t('dashboard-scene.query-transform-list.header', 'Pipeline flow')}</span>
               </Stack>
             </div>
diff --git a/public/app/features/dashboard-scene/panel-edit/PanelEditorRenderer.tsx b/public/app/features/dashboard-scene/panel-edit/PanelEditorRenderer.tsx
index c496d7bdc1b..61b8b7cf138 100644
--- a/public/app/features/dashboard-scene/panel-edit/PanelEditorRenderer.tsx
+++ b/public/app/features/dashboard-scene/panel-edit/PanelEditorRenderer.tsx
@@ -1,11 +1,12 @@
 import { css, cx } from '@emotion/css';
-import { useEffect, useMemo } from 'react';
+import { useEffect, useMemo, useState } from 'react';
+import { useMeasure } from 'react-use';
 
 import { GrafanaTheme2 } from '@grafana/data';
 import { selectors } from '@grafana/e2e-selectors';
 import { t } from '@grafana/i18n';
-import { SceneComponentProps, VizPanel } from '@grafana/scenes';
-import { Button, Spinner, ToolbarButton, useStyles2, useTheme2 } from '@grafana/ui';
+import { SceneComponentProps } from '@grafana/scenes';
+import { Spinner, ToolbarButton, useStyles2, useTheme2 } from '@grafana/ui';
 import { MIN_SUGGESTIONS_PANE_WIDTH } from 'app/features/panel/suggestions/constants';
 
 import { useEditPaneCollapsed } from '../edit-pane/shared';
@@ -13,7 +14,7 @@ import { NavToolbarActions } from '../scene/NavToolbarActions';
 import { UnlinkModal } from '../scene/UnlinkModal';
 import { getDashboardSceneFor, getLibraryPanelBehavior } from '../utils/utils';
 
-import { PanelDataSidebarRendered } from './PanelDataPane/PanelDataSidebar';
+import { PanelDataSidebar, SidebarSize, SidebarState } from './PanelDataPane/PanelDataSidebar';
 import { PanelEditor } from './PanelEditor';
 import { SaveLibraryVizPanelModal } from './SaveLibraryVizPanelModal';
 import { useSnappingSplitter } from './splitter/useSnappingSplitter';
@@ -22,7 +23,7 @@ import { scrollReflowMediaCondition, useScrollReflowLimit } from './useScrollRef
 export function PanelEditorRenderer({ model }: SceneComponentProps<PanelEditor>) {
   const dashboard = getDashboardSceneFor(model);
   const { optionsPane } = model.useState();
-  const styles = useStyles2(getStyles);
+  const styles = useStyles2(getWrapperStyles);
   const [isInitiallyCollapsed, setIsCollapsed] = useEditPaneCollapsed();
 
   const isScrollingLayout = useScrollReflowLimit();
@@ -86,150 +87,93 @@ function VizAndDataPane({ model }: SceneComponentProps<PanelEditor>) {
   const panel = model.getPanel();
   const libraryPanel = getLibraryPanelBehavior(panel);
   const { controls } = dashboard.useState();
-  const styles = useStyles2(getStyles);
+  const [sidebarState, setSidebarState] = useState<SidebarState>({ size: SidebarSize.Mini, collapsed: false });
+  const [containerRef, { height: containerHeight }] = useMeasure<HTMLDivElement>();
+  const [vizRef, { height: vizHeight }] = useMeasure<HTMLDivElement>();
+
+  const styles = useStyles2(getStyles, sidebarState);
 
   const isScrollingLayout = useScrollReflowLimit();
 
-  const { containerProps, primaryProps, secondaryProps, splitterProps, splitterState, onToggleCollapse } =
-    useSnappingSplitter({
-      direction: 'column',
-      dragPosition: 'start',
-      initialSize: 0.5,
-      collapseBelowPixels: 150,
-      disabled: isScrollingLayout,
-    });
+  const gridStyles = useMemo(() => {
+    const rows = [];
+    const grid = [];
 
-  containerProps.className = cx(containerProps.className, styles.container);
+    if (controls) {
+      rows.push('auto');
+      grid.push(['controls', 'controls']);
+    }
 
-  if (!dataPane && !isScrollingLayout) {
-    primaryProps.style.flexGrow = 1;
-  }
+    grid.push(['viz', 'viz']);
+    rows.push('1fr');
+
+    if (dataPane) {
+      // rows.push(`${(containerHeight - vizHeight) + 40}px`);
+      rows.push('auto');
+      grid.push(['sidebar', 'data-pane']);
+      if (sidebarState.size === SidebarSize.Full) {
+        for (let i = 0; i < grid.length; i++) {
+          grid[i][0] = 'sidebar';
+        }
+      }
+    }
+
+    return {
+      gridTemplateAreas: '\n' + grid.map((row) => `"${row.join(' ')}"`).join('\n'),
+      // gridTemplateRows: rows.map((r) => r).join(' '),
+    };
+  }, [controls, dataPane, sidebarState.size]);
 
   return (
-    <div className={cx(styles.pageContainer, controls && styles.pageContainerWithControls)}>
+    <div ref={containerRef} className={styles.pageContainer} style={gridStyles}>
       {controls && (
         <div className={styles.controlsWrapper}>
           <controls.Component model={controls} />
         </div>
       )}
-      {dataPane && (
-        <div className={styles.sidebar}>
-          <PanelDataSidebarRendered model={dataPane} />
-        </div>
-      )}
-      <div {...containerProps}>
-        <div {...primaryProps} className={cx(primaryProps.className, isScrollingLayout && styles.fixedSizeViz)}>
-          <VizWrapper panel={panel} tableView={tableView} />
-        </div>
-        {showLibraryPanelSaveModal && libraryPanel && (
-          <SaveLibraryVizPanelModal
-            libraryPanel={libraryPanel}
-            onDismiss={model.onDismissLibraryPanelSaveModal}
-            onConfirm={model.onConfirmSaveLibraryPanel}
-            onDiscard={model.onDiscard}
-          ></SaveLibraryVizPanelModal>
-        )}
-        {showLibraryPanelUnlinkModal && libraryPanel && (
-          <UnlinkModal
-            onDismiss={model.onDismissUnlinkLibraryPanelModal}
-            onConfirm={model.onConfirmUnlinkLibraryPanel}
-            isOpen
-          />
-        )}
-        {dataPane && (
-          <>
-            <div {...splitterProps} />
-            <div
-              {...secondaryProps}
-              className={cx(secondaryProps.className, isScrollingLayout && styles.fullSizeEditor)}
-            >
-              {splitterState.collapsed && (
-                <div className={styles.expandDataPane}>
-                  <Button
-                    tooltip={t('dashboard-scene.viz-and-data-pane.tooltip-open-query-pane', 'Open query pane')}
-                    icon={'arrow-to-right'}
-                    onClick={onToggleCollapse}
-                    variant="secondary"
-                    size="sm"
-                    className={styles.openDataPaneButton}
-                    aria-label={t('dashboard-scene.viz-and-data-pane.aria-label-open-query-pane', 'Open query pane')}
-                  />
-                </div>
-              )}
-              {!splitterState.collapsed && <dataPane.Component model={dataPane} />}
-            </div>
-          </>
-        )}
+
+      <div ref={vizRef} className={cx(styles.viz, isScrollingLayout && styles.fixedSizeViz)}>
+        {tableView ? <tableView.Component model={tableView} /> : <panel.Component model={panel} />}
       </div>
+
+      {dataPane && (
+        <>
+          <div className={cx(styles.dataPane, isScrollingLayout && styles.fullSizeEditor)}>
+            <dataPane.Component model={dataPane} />
+          </div>
+          <div className={styles.sidebar}>
+            <PanelDataSidebar model={dataPane} sidebarState={sidebarState} setSidebarState={setSidebarState} />
+          </div>
+        </>
+      )}
+      {showLibraryPanelSaveModal && libraryPanel && (
+        <SaveLibraryVizPanelModal
+          libraryPanel={libraryPanel}
+          onDismiss={model.onDismissLibraryPanelSaveModal}
+          onConfirm={model.onConfirmSaveLibraryPanel}
+          onDiscard={model.onDiscard}
+        ></SaveLibraryVizPanelModal>
+      )}
+      {showLibraryPanelUnlinkModal && libraryPanel && (
+        <UnlinkModal
+          onDismiss={model.onDismissUnlinkLibraryPanelModal}
+          onConfirm={model.onConfirmUnlinkLibraryPanel}
+          isOpen
+        />
+      )}
     </div>
   );
 }
 
-interface VizWrapperProps {
-  panel: VizPanel;
-  tableView?: VizPanel;
-}
-
-function VizWrapper({ panel, tableView }: VizWrapperProps) {
-  const styles = useStyles2(getStyles);
-  const panelToShow = tableView ?? panel;
-
-  return (
-    <div className={styles.vizWrapper}>
-      <panelToShow.Component model={panelToShow} />
-    </div>
-  );
-}
-
-function getStyles(theme: GrafanaTheme2) {
+function getWrapperStyles(theme: GrafanaTheme2) {
   const scrollReflowMediaQuery = '@media ' + scrollReflowMediaCondition;
   return {
-    pageContainer: css({
-      display: 'grid',
-      gridTemplateAreas: `
-        "sidebar panels"`,
-      gridTemplateColumns: `auto 1fr`,
-      gridTemplateRows: '1fr',
-      height: '100%',
-      [scrollReflowMediaQuery]: {
-        gridTemplateColumns: `100%`,
-      },
-    }),
-    pageContainerWithControls: css({
-      gridTemplateAreas: `
-        "sidebar controls"
-        "sidebar panels"`,
-      gridTemplateRows: 'auto 1fr',
-    }),
-    container: css({
-      gridArea: 'panels',
-      height: '100%',
-    }),
-    sidebar: css({
-      gridArea: 'sidebar',
-      height: '100%',
-      maxHeight: '100%',
-      overflow: 'auto',
-      paddingTop: theme.spacing(2),
-    }),
-    expandDataSidebar: css({
-      width: theme.spacing(6),
-      padding: theme.spacing(1),
-    }),
-    canvasContent: css({
-      label: 'canvas-content',
-      display: 'flex',
-      flexDirection: 'column',
-      flexBasis: '100%',
-      flexGrow: 1,
-      minHeight: 0,
-      width: '100%',
-    }),
     content: css({
       position: 'absolute',
       width: '100%',
       height: '100%',
       overflow: 'unset',
+      paddingTop: theme.spacing(2),
       [scrollReflowMediaQuery]: {
         height: 'auto',
         display: 'grid',
@@ -251,7 +195,6 @@ function getStyles(theme: GrafanaTheme2) {
       flexDirection: 'column',
       borderLeft: `1px solid ${theme.colors.border.weak}`,
       background: theme.colors.background.primary,
-      marginTop: theme.spacing(2),
       borderTop: `1px solid ${theme.colors.border.weak}`,
       borderTopLeftRadius: theme.shape.radius.default,
     }),
@@ -260,24 +203,58 @@ function getStyles(theme: GrafanaTheme2) {
       flexDirection: 'column',
       padding: theme.spacing(2, 1),
     }),
-    expandDataPane: css({
-      display: 'flex',
-      flexDirection: 'row',
-      padding: theme.spacing(1),
-      borderTop: `1px solid ${theme.colors.border.weak}`,
-      borderRight: `1px solid ${theme.colors.border.weak}`,
-      background: theme.colors.background.primary,
-      flexGrow: 1,
-      justifyContent: 'space-around',
-    }),
     rotate180: css({
       rotate: '180deg',
     }),
+  };
+}
+
+function getStyles(theme: GrafanaTheme2, sidebarState: SidebarState) {
+  const scrollReflowMediaQuery = '@media ' + scrollReflowMediaCondition;
+  return {
+    pageContainer: css({
+      display: 'grid',
+      gap: theme.spacing(2),
+      gridTemplateColumns: `auto 1fr`,
+      gridTemplateRows: `auto 0.7fr 0.3fr`,
+      height: '100%',
+      minHeight: '100%',
+      maxHeight: '100%',
+      overflow: 'hidden',
+      [scrollReflowMediaQuery]: {
+        gridTemplateColumns: `100%`,
+      },
+    }),
+    sidebar: css({
+      gridArea: 'sidebar',
+      overflow: 'auto',
+      resize: 'horizontal',
+      minWidth: 285,
+      maxWidth: 400,
+      ...(sidebarState.size === SidebarSize.Mini && {
+        paddingLeft: theme.spacing(2),
+      }),
+    }),
+    viz: css({
+      gridArea: 'viz',
+      overflow: 'auto',
+      resize: 'vertical',
+      minHeight: 200,
+      maxHeight: 700, // FIXME: needs a dynamic height
+      ...(sidebarState.size === SidebarSize.Mini && {
+        paddingLeft: theme.spacing(2),
+      }),
+    }),
+    dataPane: css({
+      gridArea: 'data-pane',
+    }),
     controlsWrapper: css({
+      gridArea: 'controls',
       display: 'flex',
       flexDirection: 'column',
-      flexGrow: 0,
-      gridArea: 'controls',
+      ...(sidebarState.size === SidebarSize.Mini && {
+        paddingLeft: theme.spacing(2),
+      }),
     }),
     openDataPaneButton: css({
       width: theme.spacing(8),
@@ -286,11 +263,6 @@ function getStyles(theme: GrafanaTheme2) {
         rotate: '-90deg',
       },
     }),
-    vizWrapper: css({
-      height: '100%',
-      width: '100%',
-      paddingLeft: theme.spacing(2),
-    }),
     fixedSizeViz: css({
       height: '100vh',
     }),
diff --git a/public/app/features/dashboard-scene/scene/DashboardControls.tsx b/public/app/features/dashboard-scene/scene/DashboardControls.tsx
index 653829fcb4f..829eb5fc8d5 100644
--- a/public/app/features/dashboard-scene/scene/DashboardControls.tsx
+++ b/public/app/features/dashboard-scene/scene/DashboardControls.tsx
@@ -250,12 +250,12 @@ function getStyles(theme: GrafanaTheme2) {
   return {
     controls: css({
       gap: theme.spacing(1),
-      padding: theme.spacing(2, 2, 1, 2),
       flexDirection: 'row',
       flexWrap: 'nowrap',
       position: 'relative',
       width: '100%',
       marginLeft: 'auto',
+      marginBottom: theme.spacing(-1),
       [theme.breakpoints.down('sm')]: {
         flexDirection: 'column-reverse',
         alignItems: 'stretch',