If your screen resolution makes screen items too small to view comfortably, you can increase the DPI to compensate.

• right click on empty space of screen ,select properties option, go to the setting, click on advanced option

• you will see DPI setting option ,in drop down box select custom setting

• one window will appear for custom DPI setting in that erase 100% so you will get 20 % there automatically and below that

• pixel setting will generate ,using left button of your mouse change it as per your requirement,like i keep it 107 % little bit big than normal size

If it is just matter of changing font size only, go to the Appearance tab, use advanced setting option to change size, color of message box, active window, and inactive windows per you