[Gnome Terminal] How can I make the terminal transparent?

Since version 3.7 this option has been removed from the Preferences dialogue. You can however still get the same effect by setting the _NET_WM_WINDOW_OPACITY X property, for example with the Devil's Pie or Devil's Pie II tools. E.g., set up Devil's Pie to start automatically with the session, and create the file ~/.devilspie/gnome-terminal.ds with these contents: (if (matches (window_name) "gnome-terminal-window-*") (opacity 90) ) You can also use this shell script that however only works for existing terminal windows and not automatically for newly created ones.