How to enlarge Gimp UI font and icon size for HDPI screen?

Solution 1:

Change icon size

  • Preferences
    • Interface
      • Icon Theme
        • Change: guess Icon size from resolution
        • Into: custom Icon Size
        • Drag slider

Change font size

  • Close Gimp
  • Open the file gtkrc of your specific theme in a text editor
    • Open the Gimp themes directory:
      • Mac: /Applications/GIMP-2.10.app/Contents/Resources/share/gimp/2.0/themes/
      • Windows: C:\Program Files\GIMP 2\share\gimp\themes\
      • Ubuntu: /usr/share/gimp/2.0/themes/
    • Open the gtkrc file for your theme:
      • Light: Light/gtkrc
      • Dark: Dark/gtkrc
      • Gray: Gray/gtkrc
      • System System/gtkrc
      • other
        If you have a customized Gimp, look here for the gtkrc file
        • Mac: ~/Library/Application Support/GIMP/2.10/themes
  • Find line with: GimpDock::font-scale = 0.8333
  • Replace with: GimpDock::font-scale = 1.6666 (or another value)
  • Start Gimp