Hello everyone,

I would like to print 3 different sizes of product labels via a ZPL printer (GK420d). 

When i press the "print labels" button i get different option like 2x7 pdf .. etc. and the zpl option. it can print but I want to modify the list and modify what it prints via ZPL. 
I tried making a module and modifying the excisting qwebs but with no luck. I might have missed something to make this to work. 

So what is the best approach to this and how? app?