After some more search, I finally found the documentation for Sidebar: https://docs.blender.org/manual/en/2.93/video_editing/preview/sidebar.html

I Found Channel selector then via:

1. First enable Sidebar via View -> Sidebar
2. Then in Sidebar -> Click View -> Channel
3. There enter the channel number you want to view (0 = result, 1,2,3,... select channel)

So I think the documentation needs updating, as this is not documented in MultiCam Documentation https://docs.blender.org/manual/en/2.93/video_editing/sequencer/strips/effects/multicam.html
I expect a reference there to https://docs.blender.org/manual/en/2.93/video_editing/preview/sidebar.html to make this more easy to be found.

How would this UI solution work for you? https://developer.blender.org/D10521

Hi, Thanks for the reply, This PR of yours quite directly addresses my problem by making the workflow very intuitive.
In this case documentation would be not so important as it is in the current very hidden implementation :)

@Richard Antalik (ISS) For the record, I'm not convinced that the above UX problem can be solved by documentation alone.