repeat last action (G key in maya)
In Maya you can press "g" to repeat the last action, whatever that may be, I think it would improve the usability and speed things up if implemented in 3ds max.
Say I connected two vertices, then I select two more and could just press "g" to connect those two. Its useful if you need to do something multiple times and you dont have the action bound to a hotkey.
as said, you have that action already in Editable Poly, and also you can click the tittle of the Quad and it will repeat the last action (highlighted in blue)
Emperor Toe commented
Editable polys already have this. But seeing it implemented so you could use it for all actions would be nice