For example, does it not seem intuitive to you that it should be possible to take a brush tool and paint on the canvas? In GIMP, you can usually do that, but so

For example, does it not seem intuitive to you that it should be possible to take a brush tool and paint on the canvas? In GIMP, you can usually do that, but sometimes you can't, for reasons that are initially baffling. Once you figure out it's to do with layer boundaries it becomes merely annoying and frustrating. Once you get used to doing "Layer to image size" things get a bit easier, but needing to a) know that and b) constantly do that is not a useful feature.