CubeMx is a GUI java application, java application uses your computer screen resolution to determine the best font size.
But if you want to change it, you have two options
1-Using windows scaling under screen settings(but keep in mind windows in general not good in scaling, so older version is even worse. like windows 7)
2-Change font scaling using jave it self as described in the following link
https://superuser.com/questions/652606/is-there-a-way-to-increase-the-default-font-size-for-java-gui-applications
Regards,
Mazen
