Game Development Reference
In-Depth Information
Spread and pinch
To "spread" means to touch the screen with thumb and forefinger and move the fin-
gers apart, an action also known as "pinch in". This is often used to zoom in.
Pinch (or pinch out), on the contrary, means to touch the screen with thumb and fore-
finger and move the fingers together. This is usually done to zoom out.
Pan
Touch the screen with one finger and move in any direction. This operation is used
to pan the view when an application offers an interactive area which is larger than
