I have upgraded from 2018 to version 21. I use a lot of grouped images and found with this version when I change the line color, the software automatically changes the line size of items that were 0.0 to 1.0.
This is forcing me to ungroup images and manually correct the line sizes back to 0.0. Defaults and toolbox is not the answer either, as my markups are Redline As Built being approved and switched to Black.
I apologize if this has been discussed already, but my search results came up empty.