This tutorial deals with shaders, texture pages, and surfaces, but if you don't know anything about any of those things I've tried my best to break down everything that you need to know to get it to work. I also explained how palette based sprites work in general, too
(however, I don't think you can use the drag and drop interface to do this, but I could be wrong - I personally haven't used it since Gamemaker 4 haha)
@snailerotica heck yea
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