There is no mention (that I can find) in the manual on how to delete channels from a group in blind.
I learned that you have to use the following syntax:
Chan# [Delete] [Enter]
I want to request to following syntax to be added:
Chan# [@][Enter]
also from live with the addition to the syntax of [Update]
to bring it in line with taking channels out of a Cue.
Also it could be useful to add this to the manual in the section 'Editing groups from the group list'
