By default window title bar on Gnome has bigger font size. How can I resize that font size on window title bar? I want it to be smaller like on KDE or MS Windows.
In Gnome 3, you can adjust titlebar fonts with
Fonts > Window title font
org > gnome > desktop > wm > preferences :: titlebar-font
gsettings (in terminal):
gsettings set org.gnome.desktop.wm.preferences titlebar-font 'Droid Bold 10'
Droid Bold is the name/type of your font and
10 is the size.
This works as long as your titlebar doesn't use system fonts:
gsettings set org.gnome.desktop.wm.preferences titlebar-uses-system-font false