The Multi-Touch screen functions as both a display and a user interface that you can control with your fingertip. You can perform three main touch commands:
Zoom (pinch or double tap)
The Multi-Touch screen lets you rotate the iPhone vertically or horizontally to make it easy to view data. No matter how you rotate your iPhone, the select, scroll, and zoom touch commands work the same.
The simplest command is select, which lets you tap an item that you want to select. To use the select command, point at an icon or button, press it lightly, and lift your finger off the screen again. When done correctly, the select command involves nothing more than tapping the screen. ...