I get this question a LOT and I personally wish I had a good and clear answer. It's been asked widely online over the years.
Since things change, I am asking again.
How do we effectively increase the font size for Dynamics GP text? What #lifeHacks do you use to make this easier?
Microsoft MVP | Twitter | LifeHacks365.com
Install GP Power Tools and use it to fix the font scaling and enable bitmap scaling via the Dex.ini Settings window.
All explained on my blog (as highlighted by B@) https://winthropdc.wordpress.com/2016/11/08/gppt-using-microsoft-dynamics-gp-with-high-dpi-on-high-resolution-monitors/
PS: I also fixed the screen output memory for report writer ages ago when you asked and now have fixed Microsoft's bad implementation of their "fix" (just maximizing).