HTC One M8 User Manual page 38

Slide two fingers together to zoom out of the picture or text.
Two-finger Swipe
Swipe down from the status bar using two fingers to access Quick Settings.
Three-finger Gesture
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Swipe up using three fingers to share content such as photos, videos, and music from
your phone. You can also share streaming media from apps such as YouTube™.
Phone Basics 37