You can customize the layout of icons on the Home screen—including the Dock icons along the bottom of the screen. If you want, arrange them over multiple Home screens.
Touch and hold any Home screen icon until the icons begin to wiggle.
Arrange the icons by dragging them.
Press the Home
button to save your arrangement.
You can also add links to your favorite webpages on the Home screen. See Web Clips.
While arranging icons, drag an icon to the right edge of the screen until a new screen appears. You can flick to return to the original screen and drag more icons to the new screen.

You can create up to 11 screens. The number of dots above the Dock shows the number of screens you have, and indicates which screen you’re viewing.
Flick left or right, or tap to the left or right of the row of dots.
Press the Home
button.
Choose Settings > General > Reset and tap Reset Home Screen Layout.