I already read issues about placing 2 designs on the same product (t-shirt in my case), and I learned you can’t yet (with the new interface that is the only one I know).
BUT, how can I put my design ONCE on the back of the t-shirt? Seems impossible (in the same way) to me.
When I start editing a design I have the image already placed on the front and no way to move it to the back. If I click “Back” there is no image of course.