Please add a keyboard shortcut for Rectangular Zoom when georeferencing. There is an existing shortcut for continuous zoom (Z)....but I would much rather have a shortcut for rectangular zoom.
Rectangular zoom offers much better precision control of where you actually zoom, while continuous zoom offers only a vague movement that kind of moves you in the right direction. Georeferencing is a precise operation, not a vague one.
Currently, it takes too many mouse clicks to go back and forth between rectangular zoom and the Add Control Points tool. This should be an easy toggle, but it is not.
Please either add an additional keyboard shortcut for rectangular zoom, or change the existing Z shortcut to rectangular zoom instead of continuous zoom.