Dell Inspiron 20 (3048, Early 2014) - Manual (Page 52)

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Using Your Touchpad
Circular Scroll Up/Down — Allows you to scroll
up/down.
In the vertical‑scroll zone at the right edge of the
touchpad, move your finger clockwise to scroll up
and counterclockwise to scroll down.
Circular Scroll Left/Right — Allows you to scroll
left/right.
In the horizontal‑scroll zone at the bottom edge of
the touchpad, move your finger clockwise to scroll
right and counterclockwise to scroll left.
Zoom
One-finger zoom — Allows you to zoom‑in or
zoom‑out by moving one finger in the zoom zone
(at the left edge of the touchpad).
Move a finger up in the zoom zone to zoom‑in.
Move a finger down in the zoom zone to zoom‑out.