On the Mac, you can always hit Command-Z to undo something. You can also hit Command-Shift-Z to redo something and put it back to what it was before you hit undo. Make sense? This isn’t so easily done ...

Google’s Gboard on Android is full of useful keyboard features, and it seems like there’s always something new around the corner. Now, it looks like Gboard is adding an “undo” button for bringing back ...