I just got the Trimmer attachment and I created the map for each area I want it the trim, will it automaticly start trimming your main map you created?
If you have the trimmer enabled in working preferences and in the area and you also set the trim edge (yellow line) along the boundary sections or NGZ sections you want trimmed, then yes it will. Otherwise you can make a memory path and add that to a work plan and have it trim that way instead.