Hi Rebecca! As far as I know, there isn't a great way to do this within Tableau only except by using parameters. Do the two measures have different values for every record in the data set?
As an alternative, you could have the user enter the measures into Excel and then use that Excel file as a data source.
Thanks, David. That has been my understanding, but I figured someone might know a workaround. They are binary measures, so there will be different values throughout the data set but only two.