DrumTracks - howto change midi Channel?

when i want to change the Midi Channel of a specific drumlane the manual tells me to press and rotate the Output Encoder. So i hold the drumlane-arrow-button and push and turn the OutputEncoder. But nothing happens when i do this. If i had changed the note, it only jumps back to the default note, thats all-

Am i missing something or is this a bug?

okay… i have short click the Output encoder, not hold and rotate it