KPerry
Unmaximise SONAR window
Drag it so it goes across the monitor divide line
Hit F11
Good move.
I had not tried the full screen ploy.
This hides the title bar, and the taskbar on the left monitor.
Sadly, pressing F11 again shows the task bar, hiding the collapsed multidock.
But, way better than dragging corners.
Thanks.
I still want it as a button, and to be able to save window settings with screen sets.