Had a similar problem. Found the following:


Right click on the window titlebar and select "More Actions" -> "Window Manager Settings".
There choose "Focus" in the column to the left. 
Toggle option "Active screen follows mouse".


If no other defaults are specified, windows appear on the currently active screen.
With the procedure described above, mouse position defines this active screen.

How can I open a window on a different monitor?
I want to produce with Mathematica something like this



Or this



12 hours should be arranged in a pleasing ("rotated") style around / within a rectangle. I don't ask for the hands - depending on numerical input - but only for a Graphics to begin with.


"Have you tried anything ?"
"Sure, but with non-presentable results."

