Customize your in-game interface deeply with the Utility UI addon for Minecraft PE. Change your crosshair type and color, choose the color scheme for the entire UI, and add tooltips on the screen. Think about anything you want to alter in the UI right now, and I assure you that you will be able to do it.
Credits: HJN
To move into Settings, go to the Pause screen, then press on the gears in the top left corner two times.