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-### Optional parameters
-Some functions like aliasByNode support an optional second argument. To add this parameter specify for example 3,-2 as the first parameter and the function editor will adapt and move the -2 to a second parameter. To remove the second optional parameter just click on it and leave it blank and the editor will remove it. 
-
-![](http://grafana.org/assets/animated_gifs/aliasByNode_optional_second_param.gif)
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