Nothing can be saved or changed on the !demo channel, but you can on your own channel.

Points rewards - !demo

Icon Title Prompt Manage? Commands
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If you are a Twitch partner or affiliate, you can see here a list of all your channel point rewards, whether they can be managed by Mustard Mine, and a place to attach behaviour to them. Coupled with appropriate use of channel voices, this can allow a wide variety of interactions with other bots.

You can remove functionality from a reward by deleting the corresponding command, or editing it so that it no longer responds to the redemption (if you want to keep the command for other purposes).

Configure reward details here