HTC One M8 - Manual (Page 33)

Press and flick
On the Home screen, you can easily move a widget or
icon from one screen to another.
Press and hold the widget or icon with one finger, and
flick the screen to the new location with another finger.
Slide with two fingers
In some apps, like Gallery, Messages, Mail,
or the web browser, slide two fingers
apart to zoom in when viewing a picture
or text.
Slide two fingers together to zoom out of the picture or
text.
33 Your first week with your new phone