Press "N" to open the command menu.
The Command Menu adds a Gamemode menu a Weather menu and a Give menu.
In the Gamemode menu, you can switch between gamemodes (Creative, Survival, Adventure, and Spectator).
In the Weather Menu you can change the weather (Clear, Rain, and Thunder).
In the give menu you can give yourself (10 diamonds, 10 bedrock, 100 diamonds, or 100 bedrock)(You do not need cheats on).