This shortcut is used by 360 programs in our database.
General description for this shortcut: Takes your last action back in most of editing programs. Some people wonder why the letter "Z" is used for undo. It's probably because of keyboard position. Ctrl + Z is easy to press and also in the same row with Ctrl + X, Ctrl + C and Ctrl + V which are very frequently used shortcuts.
What this shortcut does in different programs?
All programs using this shortcut, by category.