Hi Kateřina Thanks for your feedback. iClone already has this function, you can find it in "Preference" panel. Please go to Menu > Edit > Preference, or press hotkey Ctrl+P to open it. Scroll down panel to "Interface" section and select "Icon and Font Size" which you need, close application and re-launch it, the interface will be changed. Please feel free to contact us if any, regards. Tina