Dell XPS 15 (L502X, Early 2011) - Manual (Page 51)

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Using Your XPS Laptop
Scroll
Allows you to scroll through content. The
scroll features include:
Pan — Allows you to move the focus on the
selected object when the entire object is not
visible.
Move two fingers in the
desired direction to pan
scroll the selected object.
Scroll Vertical — Allows you to scroll up or
scroll down on the active window.
Move a finger up or
down to activate vertical
scrolling.
Scroll Horizontal — Allows you to scroll right
or left on the active window.
Move a finger to the
right or left to activate
horizontal scrolling.
Rotate
Allows you to rotate the active content on
the screen.
Twist — Allows you to rotate the active
content using two fingers.
Keeping a finger or
thumb in place, move the
other finger in an arced
direction right or left. You
can also rotate the active
content by moving both
the fingers in a circular
motion.