Returns format string for the measure that is currently being evaluated.
This expression has no parameters.
Format string of the measure currently being evaluated – which is the measure identified by SELECTEDMEASURE.
Learn more about SELECTEDMEASUREFORMATSTRING in the following articles:
Contributors: Alberto Ferrari, Marco Russo
MSDN documentation: https://docs.microsoft.com/en-us/dax/selectedmeasureformatstring-function-dax