How it works
The poster template has a wide frame. Your image is fitted inside the mat and keeps its own proportions, so a square print gets white space on the sides.
Wall art sells on how it looks in a room. A clean frame shot makes the size and the border clear before the buyer reads the listing.
Use JPG or PNG. Full-bleed artwork looks best because the mat already adds white space around it.
Questions
Does it support portrait posters?
The frame is wide. A portrait image is fitted inside it with margins.
Can I change the wall colour?
Not yet.