How to setup Gnome 3 dual monitor configuration?

Question

linux

Hello! On a freshly installed Arch, I'm trying to bring gmone 3.12 to a form that is convenient for me. I have two monitors and gnome somehow strangely defined the desktop, that is, both monitors work, but when you switch to the second desktop, it switches only on one (main) monitor, and the second one does not react to switching in any way, but I would like to, so that both monitors are one workspace and, accordingly, the desktop change occurs on both.
How to do it?
And the second question: the monitors are connected in the expand mode, on the main monitor there is a gnome panel on top, and the second monitor is empty (except for the wallpaper) how to duplicate the top panel on the second monitor?
// regarding the second question, I decided to follow the advice and postpone it until better times.
Thanks in advance!

Answer 1

The first one is easy to find, in my opinion even the Gnome Tweak Tool has an option:
ubuntuforums.org/showthread.php?t=1973027&p=120700...
The second one is most likely impossible, but from experience I didn't need it, more free space.