Minecraft wiki entry for Commands, associated text: In the client, commands are entered via the chat window, which is displayed by pressing the T / ‌[BE & EE only] / ‌[BE only], or, / key. Using the / key also enters the forward-slash that commands require as a prefix, so it is a useful shortcut. The ↑ and ↓ keys can be used to view previously entered text, including all previously executed commands. Pressing Tab ↹ while entering commands cycles through possible commands or arguments, and can be used to auto-enter the coordinates of the block looked at before entering the chat.