Chrome (Mac): If you're a Gmail user on the Mac, here's a handy tip: you can preview the contents of a message with a two-finger tap. Lifehacker reader Brodie wrote in to tell us about this unexpected discovery:
I just had something crazy happen. When you use two finger tap (on Mac with Chrome) on a message in your inbox in Gmail it gives you a preview of the message. Really handy to see what is in it without opening it!
If you haven't already discovered this for yourself and like multi-touch gestures, it's a good addition to the repertoire. Thanks Brodie!