Go to Settings on your iPhone
Tap Home Screen & App Library
Turn on or off Show App Library Only (if available)
Tap Home Screen Layout
Select the layout you want (if available)
Press the Home button (or swipe up) to return to the Home Screen
To change which apps appear: press and hold an app icon
Tap Remove App
Choose Remove from Home Screen (keep the app in App Library)
To add apps back: open the App Library
Press and hold the app icon
Tap Add to Home Screen