In the "Channel properties configuration"-List (by the way: it is accessable with a button named "Channel fade configuration", which descripes it better) there is a column named "Can fade". This is highly confusing me, because many channels of an fixture can be faded and the use is not explained in the help.
So now i found out it makes a Channel dependent of the Masterfader, a very helpful function.
If I´m right, the column should be named "Masterfade" for better self-explanatory.