one more vote for the DELETE key
But maybe a compromise:
For me it seams most intuitiv to have the Delete-Key only active after a mouse klick in the corresponding GUI-Element, if the mouse is still over the GUI-Element / has Focus.
(i mean you click on the Layer-Name, or you click on the RhinoObject in the Viewport … before deleting them)
As soon as the mouse leaves / Focus is lost, the Delete Key should loose its power and not gain it back just by mouse-Over.
I think Input-Focus is a general GUI-Topic for Rhino to be looked at :
… if you enter some Properties -for example the Name of an Object- and press Enter / Return, i would love to have Enter as “confirm” and the Focus should be back on the command line or the previous Element. But we get the entire Name selected.
RhinoForMac has even more ugly Focus / Enter-Return … behaviour especially for command options - and different from Windows…
and i also agree, for all user who have to adapt to work more precisely with there mouse - there is Undo…
kind regards -tom