Replaces the command block GUI to allow editing multiple command blocks at once.

• Edit multiple command blocks at once.
• Apply changes without closing the GUI.
• Edit functions in datapacks (beta).
• Split a single command across multiple lines.

• Move command blocks around within the GUI.
• Add additional commands to the chain from within the GUI.

Shift-click on the command block icon in the GUI.

It's used to store the multi-line versions of commands, since Minecraft doesn't natively support them. If this file is deleted, all commands will be collapsed to their single-line versions.

Multi-line commands are stored in the commandblockide.bin file on your computer, which is not synced to other players in multiplayer. If you need to work on commands collaboratively, you will have to stick to single-line commands for the time being.

Either the single-line and multi-line versions of the command are out of sync or there is no multi-line version available. This can happen when logging in to Minecraft from a different computer or when another player edits the command.

No.

No.

Maybe.