More than one design on a product

I just opened my first shop and uploaded some designs, but i now i have a problem.
I want a shirt with two different designs. One on the front and the other one on the back.
But i don’t know how to do this… Someone please help me :smiley:

Ahoy @User_EU-7c481743,

please have a look to this blogpost and let me know if you ned further information.

I received my payout just about 1 minute a go and i found that may ernings was diminished
Why was my earnings diminished ?

I will appreciate any help
thank you .