R-clicked all around the window frame. No joy.
I’m trying to move my Obsidian window to my 2nd Desktop or All Desktops. The action appears on the window-frame dropdown menu.
Kubuntu 20.04 - Plasma display controller
This screenshot shows the window-frame R-click menu on a normal window.
Workaround: Close Obsidian, switch to the desired desktop, reopen Obsidian