Dear Frank,
Thanks for your reply.
But this is NOT an issue with "Palette 2".
The brim is made by Cura. Also my screenshot shows Cura.
So I need a option in Cura to prevent this behavior. I think this is a Cura bug.
Because when selecting nozzle1 for brim, I expect the brim made only by nozzle1 and NOT nozzle2.