Shell – How does one modify the title bar at top of gnome desktop

Open the System Settings > Displays control applet. It's not evident - at all - but you can drag the miniature of the top black panel onto the display you want to mark as primary. Panels, activity overlay and everything will migrate on that display.

I am using Fedora linux. Most people in our household use Gnome3 but I use Xmonad (which is similar to awesome, but better). This is no problem, as I have Xscreensaver running.

When Xscreensaver is started and saving the screen and you move the mouse, there are two options below the password entry field: New Login and OK. The last is for accepting the password to unlock the screensaver. The other one starts GDM on a new VT.

All of this worked out of the box. I just installed Fedora, then Xmonad and Xscreensaver. And I’ve set the option to lock the screen if Xscreensaver saves the screen. Because otherwise you don’t have the option for a new login but just quit the screensaver on mousemovement.

Maybe this is similarly easy to configure in Arch linux. Or maybe you could just crib from Fedora (or from a Fedora forum or ask.fedoraproject.org). I did not try if this works with Gnome-Screensaver somehow. But Xscreensaver anyway fits better to Xmonad.