On a Windows 10 computer:
- Hold down ‘Alt’ + ‘Tab’ (A window selection pop-up should appear on the primary display)
- While continuing to hold ‘Alt’, release ‘Tab’
- Tap ‘Tab’ multiple times to cycle through to the window you wish to move
- Release ‘Alt’ (The window will now be selected as if you had clicked on the title bar)
- Press ‘Alt’ + ‘Space’ (This opens the window’s ‘Window’ menu)
- Press ‘M’ (This selects the ‘Move’ command, turning the cursor into a cross with arrows)
- Use the keyboard’s arrow keys to move the window back onto the primary display
- Press ‘Enter’