start GUI on 2 local monitors

start GUI on 2 local monitors References I have a ubuntu LTS box with two monitors configured with NVIDIA X Server Settings software, so that the GUI applications can be dragged between the two monitors. This configuration is fine and everything working as expected. The question is How to open a terminal start a xclock on monitor #1, then, start another xclock on monitor #2. I\'ve tried to use export DISPLAY but does not work since both monitor display id are the same as :0. Can any one help?