How do you get channels out of capture?

I used to run boards years ago, but I have not run one (or thought about it) in a very long time.  I am working at a school with an Express 24/48.  They have it set up with a dimmer per channel.  When I do anything in stage it captures the channel.  How do I get it to release the channel?  I have been looking through the manual and have not found anything.

It is also not running the cues I set up.  I am assuming it is because the channels are captured.  I have a show soon so I need to figure this out.

Thanks.

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