Hello,
I created a "cheat sheet", that is a list of shortcuts for editing, navigation, selection and track management. The shortcuts are for 21.04.3.

Download ODT: https://alundnc.dynv6.net/index.php/s/MXG93zjQeyGFKim or PDF: https://alundnc.dynv6.net/index.php/s/HeKJzgC5QRjNcSP

Comments are wellcome, let me know if I forgot something, misspelled something og organized it badly.

UDATED: Shortcut for setting target track added, since I forgot that.