SW 2020 SP5.0

This file had been going great for a while, then I noticed the dimensions were much smaller than usual. Also double clicking on a dimension to bring up the "modify" popup doesn't work. 

And for whatever reason, solidworks doesn't let me use global dimensions using dimensions in the property manager tab. I can change the dimension to a value, but the only way I've figured out to use a global dimension is to create a dimension, exit the sketch or feature, then edit it using the equations window. 

If I create a new file, same instance of solidworks, that file is fine. Dimensions are normal size. I can double click on the dimension value to change it. 

Any idea what could be wrong with the other file? I saw a few suggestions on the forum for similar problems but trying those solutions didn't work, like changing the "always display text at the same size" setting in document properties>detailing.

Yeah, that allows me to change the text size bigger, but it doesn't fix the double click issue for that file. 

Any ideas?