HTC X+ - Manual (Page 21)

Pinch the screen to zoom out of the picture or text.
Two-finger swipe
In some apps that have sorting, like Mail or Contacts, swipe up or
down using two fingers to scroll the screen. The screen displays the
sorting order, and you can easily scroll to the information you want.
Three-finger swipe
Swipe up using three fingers to share content such as
photos, videos, and music from HTC One X+ to your TV
or speakers.
21 Your first week with your new phone