Im in the middle of setting up my shop but have gotten stuck, I sell posters in either A4 or A3 so just two variants.
I want to run an offer for buy 4 A4 prints for £14.99 and that seems okay but it included the A3 in the deal as I cannot separate the two sizes when making the collection.
Any ideas, how to make 2 collections one for the A4 SIZE and another for A3 as the prices and deal will be different.
Not possible on a collection level, you would need to have the discount setup on specific products, then you can select the variants instead of using a collection that will use all the variants
Hope this helps