First, you need to read this where to find the template: guide template
Once you find the pdf guide saved to your computer, go to that file and open it using the design software you use. (you can see the actual size guide.)
based on my experience, you need to create seamless repeat tiles the same size as the template guide
In my case, I chose texture vinyl peel-and-stick wallpaper. My pattern swatch is 4000px in width and height.
then I create a new canvas in my affinity designer in 7200px by 7200px (this guide from the pdf size guide template); after that, I place my 4000px swatch to the canvas and drag it to the corner until it is equal size to one of the quadrants of the square canvas, which is 3600px, so this is the size of my new swatch, so you can start repeating the tile seamlessly and upload it to Zazzle. and ensure that when you upload to Zazzle, the tile is turned into none. I hope you understand my instructions.
