Hello! I would like to activate this mode to have a kind of tileable canvas, i don't know how to do it :( Gif example: https://gyazo.com/9cfc4d86b913fae13e42e1ad09f46f0d starts the mode that i want in 0:04s Thanks so much!
This is just a guess without seeing the full tutorial or uncropped interface, but I'm pretty sure they just set their Document size to a square size (eg: 512x512). The size or ratio isn't necessary, it just helps if you plan on exporting a seamless, square image. What they're going is drawing the branches onto the Document…