excuse my stupidity…what’s STRG?
I tried CTRL+M, but nothing happens because it is not bound to anything in my keyboard shortcuts. And I’m not sure where exactly to click before doing that
EDIT: ctrl+M moves an actor. i wasn’t able to copy and move it right away, but anyways I edit>duplicate the navmesh, edit>copy, make sure the destination level is selected in Levels tab, right click in the viewport, edit>paste. and then adjust position.