I agree, the font rendering is not great and could be improved. However, I found out that the situation improves significantly by changing (with right click on geany.exe): `Geany Properties => Compatibility` `'Overrite high DPI scaling behaviour' of Application`
I got the idea from [Fix Fuzzy Windows 10 Text on High Resolution Displays](https://www.groovypost.com/howto/fix-fuzzy-windows-10-fonts-high-resolution-...).
I just made a GITHUB accoun to thank you for this. THANK YOU.