You can shorten the names below the icons in your app tray.

If you have multiple home screens, you swipe to move between them. By default, they’re a line; when you get to the last one, you need to swipe the other direction to go back. If you’d prefer them to be a circle, so you can swipe one direction to move from last to first, change settings:

If you want the icon for the Phone app and Messages app to indicate when you’ve missed a call or have unread messages: