Dell XPS 18 User Manual page 24

Finger gestures
Zoom in
Touch the display with two fingers
and then move the fingers apart.
Rotate
Touch the display with two or more
fingers and then move the fingers in a
clockwise or counter-clockwise arc.
For more information on using Windows 8 Start screen, see
http://support.dell.com/windows8
http://windows.microsoft.com/en-US/windows-8/get-started
well as touching the Dell Getting Started with Windows application (on
the Metro screen).
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Using Your Computer
Allows you to:
Increase the zoom level of an image
or web page.
Rotate an object by 90 degrees.
and
as