Changing Game Modes in Minecraft In-Game

The game mode is adjusted using the /gamemode command. Enter the command in the chat bar, which you can access by default using the [t] key.
You can choose between four different modes.

Note: Replace [playername] with the name of the player for whom you want to change the game mode.

Survival Game Mode

Use the command /gamemode survival [playername] to enter the “normal” Minecraft game mode.

Creative Game Mode

With the command /gamemode creative [playername], you can activate the creative game mode. You will have access to all blocks and can fly by pressing the space bar twice.

Adventure Game Mode

By using the command /gamemode adventure [playername], you start the adventure game mode. In this mode, you cannot mine blocks. Only pressing switches and crafting items is possible.

Spectator Game Mode

By using the command /gamemode spectator [playername], you start the spectator game mode.

If the player’s name is, for example, Peter, the complete command would look like this:
/gamemode creative Peter
Please pay attention to the capitalization of the names!