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I can use Ubuntu Tweak to change font size on the background but I can't change this:


Can anyone help?

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up vote 3 down vote accepted

Open a terminal with and use this command

gsettings set org.gnome.desktop.wm.preferences titlebar-font 'Ubuntu Bold 9'

It will change the font to Ubuntu bold with size 9.

Here is the screenshot:

enter image description here

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It works, thanks! – Gregory Oct 20 '12 at 12:04

Open System Settings, for example by searching for it in the Dash: System Settings Open the options for Universal Access: Universal Access Here you can choose between four different text sizes: Text size

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