Why does Adobe insist on making things difficult? Why can't they use the same shortcuts from Photoshop that we have used for years? Or at least give us the option to change them?
CROP = C (in PS) R (in LR)
Come on, this is one of the most common used features. Why? Is this asking too much???
Pressing Ctrl+/ will bring up a list of the keyboard shortcuts for the current module. With a little practice, it's very easy to learn and remember the shortcuts you use most often. Pressing any key or clicking with the mouse will close the shortcut list overlay.