iPhone: Shake to Undo, Shake to Redo
Here’s a quick tip for your iPhone.
When you’re typing in any of Apple’s built in applications and in some Apps that you bought from the App Store you can just shake the phone if you want to Undo what you’ve typed or edited.
And guess what, after you Undo something you can Redo it by shaking the phone once more.
This is similar to CTRL+Z in Windows or CMD+Z on a Mac which of course we all know and love and must be one of the handiest shortcuts invented after copy and paste of course!