Add/Remove Frame on Timeline Hotkey

I think it's about time I share this one. Over the past couple of years I have been using a very simple but invaluable hotkey, provided by Cameron Fielding on his blog FLIP. I use it all the time. Thanks, Cam!

// add a frame ( I have this assigned to the (hold) Alt and (press) + key )

timeSliderEditKeys addInbetween;

// remove a frame ( I have this assigned to the (hold) Alt and (press) - key )

timeSliderEditKeys removeInbetween;