Where did the setting go in Acrobat for changing the text size of a dimension?
It's not a built-on feature of Acrobat. But you can do a workaround by copying an pasting larger type from a text box. I do a writeup about that here: Document Geek: How to Change the Text Size in Measurement Tool In Acrobat DC
This is basic functionality that should not need a work around. Not sure why adobe finds it so difficult to add the most fundamental features to their package. It would seem that the developers do not actually use the product otherwise they would immediately run into such basic nuisances. If and Adobe developer reads this, can you please fix this...i dont see why this should take a plea from your customers given the price that we pay for the software.
This needs to be added to the next update. It's so necessary