uh...they all make more sense on an iPad than the phone though lol.
Considering that command-Z is not discoverable either, it’s not too bad, especially as there are undo/redo/clipboard buttons on the keyboard in most cases.
Traditionally, the keyboard shortcut for undo has been listed next to undo on the edit menu. That's pretty discoverable...
Ever time you manually click edit → undo, you'll see the shortcut. It’s not invasive—it’s not some big popup that takes over the screen, or even a neon-colored tooltip that commands your attention—it’s just there, in the background, in case you happen to notice it. Maybe you’re not sure what it means at first, but if you keep seeing it every day, you just might try hitting the sequence of keys at some point...
The best UIs naturally help you progress from a basic user to an advanced user, without you even noticing it. I'm not saying the traditional desktop UI paradigm is the best that can ever possibly be done, but it has had 30 years of evolution at this point, and it's pretty darn strong.
> Many apps allow people to shake the device to undo and redo certain operations, such as typing or deleting. When initiated in this manner, an alert asks the user to confirm or cancel the undo or redo operation.
You'll love this one: to undo (don't think it works for everything, but it does for typing), shake your device rapidly from side to side.