For users to (massively) migrate from Autocad to Revit, Revit needs some serious keyboard shortcuts like Autocad. Especially: F8 = Ortho Mode, F3 = Object Snap On/Off, F7 = Grids (Datum) On/Off. Maybe some way to isolate a certain category / object with one click, like in Autocad, and grey out all other objects, NOT hiding them.