We are running Ubuntu 12.04 with Gnome 3.4.2. A number of users access the server via remote desktop and individual accounts. Most client computers have different keyboard layouts.
In GNOME "Applications > System Tools > System Settings > Keyboard Layout > Layouts" there is only one keyboard available and the list of additional keyboard layouts is empty. How can we provide further keyboard layouts, so every user can choose one that suits his/her client PC?