But what if I want to show a descriptive field as a tooltip? As of now, only measures can be displayed in the tooltip. But have no fear! One way to work around this is to create a custom calculation to display my descriptive field.
If I want to show a description of the classes within the subjects seen in the chart above, I can create a calculation like so:
Classes = CALCULATE(CONCATENATEX(VALUES(‘Grade data'[Class Name]),’Grade data'[Class Name],”, “))
So now I can show the classes within each subject as a tooltip
I really like his synonyms example. Read the whole thing.