Dell Inspiron 11 (3147, Mid 2014) - Manual (Page 55)

Using Your Touchscreen
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Zoom
Place two fingers on the touchscreen and then
move them apart to zoom‑in.
Place two fingers on the touchscreen and then
bring them closer to zoom‑out.
Dwell
Touch and hold the item on the screen to open
the context menu.
Flick
Move a finger quickly in the desired direction to
flip through content in the active window like
pages in a book.
Flick also works vertically when navigating
content such as images or songs in a play‑list.