Inbox/Gmail: Double Tap to Zoom

Everybody knows that you can use the two finger pinch trick to enlarge/shrink what is seen on the screen. I just discovered a new feature, whether it is useful or not remains to be seen. Simply put you can double tap on the text inside the email and you will be provided with a enlarged look at your emails. Double tap again and it restores to the original size. Pretty neat, but not as effective as the pinch to zoom technique.