Rearrange and delete apps: To rearrange the order of your icons, tap and hold any icon on the Home screen. After a few seconds, all your app icons, including the one you’re holding, will start to wiggle, and a small black X will pop up in each icon’s top left corner. Once they do this, you can rearrange any apps on the Home screen, or even drag them into or out of the Dock. If you’ve installed a third-party app you don’t want anymore, you can tap the X to delete it (you cannot delete the apps that came preinstalled on your device). When you’re finished, press the Home button, and your icons will stop wiggling and stay in their new location. You can also rearrange your icons and Home screen pages through iTunes when you connect your device to your computer.
Note that you’re not able to delete the built-in apps that come with your iOS device. These include Camera, Photos, YouTube, Clock, Weather, and the all-new Newsstand folder, among others. You’ll be able to tell which apps you can’t delete—they don’t sport the black X. You are able to move around these built-in apps to your liking, however.
Use folders: Having a bunch of apps scattered on your Home screen is OK if you don’t have too many, but when you start amassing a collection, you can use app folders. A folder is a group of apps, represented by a single icon, on your Home screen. Each folder sports miniature icons representing the apps inside, along with an overall name. When you tap a folder, the Dock fades and slides down, making room for a view of the folder’s contents. Within, you’ll find the name and icon for each app. Tap any app to launch it, or tap anywhere outside the folder to return to the Home screen.
To create a folder, start by tapping and holding any app icon to enter edit mode; after the icons begin to wiggle, drag an app on top of another app. When you release the app, you’ll create a folder, which will open and display both apps. By default the folder is named based on the App Store category for one of the first two apps in the folder. If you want to customize this name, just tap inside the field (while still in edit mode) and enter something new. When you’re done, press the Home button to exit edit mode.
To add another app to the folder, reenter edit mode and drag the desired app onto the folder icon. Repeat until you’ve added all the apps you want (up to 12 per folder on the iPhone or iPod touch; 20 on the iPad), and then press the Home button to exit edit mode.