@zazzle I created this square envelope, and decided to define the last mock-up picture proposed by Zazzle as the main one, in order to highlight the full illustration.
There are texts on the top of the envelope.
I was testing it with the different possible options offered, and then I changed the background color : As a result, the texts disappeared from my preview image:
Remark: Texts are ok in other preview images proposed. This problem only occur for this one.
