Auxiliary Nozzle - Fully Retract once no longer in use

Hello, I was wondering if it is at all possible to pull the filament completely out of the Auxiliary Extruder after each layer its used for?

Basically, I want to use it for Support material, however, currently once it’s used it stays in the extruder until the print is complete. I want it to retract once it’s done being used OR after each layer it’s printed.