Set game settings before entering game
Import maps, skins, addons, textures, mods
Switch between day/night, survival/creative
Change the weather
Set experience level (0-2000), enchantment level
Fly, invincible, sprint, teleportation
Switch between big/small GUI
Spawn items, mobs
To open the in-game option panel tap on the top-right MCPE Master laucher button. On the left side of the screen there is a menu from which you can choose what kind of settings you want to adjust.
Enchantment levels can be a very tedious process to level up if you were to do it all manually by hand. But with this option you can set your enchantment levels simply by pressing a few buttons.
The item spawning function lets you find items very fast as they are sorted by categories. You can also use it to spawn custom items.
One other useful function includes the possibility to add all different types of mobs to the game. Select the type and then how many you would like to spawn.
Teleportation is probably one of the most underappreciated features. For example, one use for it could be to have one spawn point setup in the mine and another back at your house.