How to remove Alt+F7 window moving hot-key in Xubuntu?

I'd like to use Alt+F7 to search for files in Double Commander.

But when I press Alt+F7 - the hotkey is intercepted and I am offered to move the window.
Settings - Settings manager - Keyboard - Application shortcuts doesn't show Alt+F7 to be bound to anything.

Where can I undefine Alt+F7 hot key then?

1 Answer

Settings - Window Manager - Keyboard

Double Click the short cut field and choose the key-combination you want