If you want to disable the “Undo” and “Redo” features (i.e., the “Undo” and “Redo” options in the context menu, Undo and Redo icons inQuick Access Toolbarin File Explorer, and the Ctrl +Z and Ctrl +Y hotkeys in Windows), there is a simple and undocumented registry edit....
It should be Ctrl+Y. Anyway, you can reset it by going to Tools - Options - Keyboard - type "redo" in the "Show commands containing" textbox; make sure Edit.Redo is selected below. Put the cursor in the Press shortcut key, and press Ctrl+Y followed by clicking Assign....
I want to have a custom undo function that I can call using a button, which will undo the last change in a textbox after a keyup event. For instance, if I press down on A and put AAAA and then lift up, it will backup so that if I press B (resulting in AAAAB) and click ...