Font size after upgrade

Check your display settings, the Scale and layout is it at 100%?

I had Scale and layout at 200%, tested new migration with 100%.

Fonts are still double size of objects.

Could you also try backup Example project from V7.40 and restore it into 2020 R2, see if the same problem occurs. It might be worth trying this on another machine and see if it is specific to that machine? Some special font package installed or another setting relating to scaling display text (accessibility mode enabled?). Hope you get to the bottom of it!

I've always had trouble with the Settings>Display>Scale and Layout setting in Windows.  Brought down the screen resolution, and it helped a lot.  I don't seem to have a 200% setting on mine.  Pity to run a High resolution monitor as 800 x 600.  Sounds like you are up on this, just my 2 cents worth.

Have you tried logging out of Windows or restarting the machine after changing the display settings?

We are replacing four full HD screens with one 4K 55" screen.

Tried restoring a 7.20 Example project, same problem.

But, restart of PC after setting Scale and layout to 100%, and the restore project worked!

Thank you all for your help!