Also, Ctrl-T (for “Get and Move Footprint”) has stopped working. It does nothing unless the crosshair is on an object in which case it bring up this dialogue box!
Many thanks, that’s what I have un-intentionally done. This plays again to one of my usability gripes with our beloved KiCad! Something so dramatic and disorientating should not be on a regular “F9” key, I would put it on a combination key or do something that at least let you know what you’ve just done - intentionally or not.