This feature is a little ( or a lot) secret in Pixelmator. If that's the case, I'd suggest working on small images using a 1 px brush and then resizing your image using the nearest neighbor resampling algorithm. I have a suspicion that you'd like to work on larger images because your pixel art loses sharpness when you upscale. In the meantime, I have a few suggestions for you. Hi Evan, making the Pixel tool snap to the grid is definitely a logical suggestion - I can't promise anything in the very near future, but what I can promise is that we'll think about this feature. Maybe Im just missing something, but man. I love this app, and really hope there is a way to make this work. Its strange to me that the pixel brush, when set to one pixel, will perfectly snap to a one pixel grid, but a 30 pixel brush will not snap to a 30 pixel grid. Only to find my 30 pixel brush wont snap to the grid with each stroke (click). I went back to start from scratch on a larger canvas, went from working in one pixel strokes on a 100 pixel canvas with a one pixel grid (where the pixel brush had no issues snapping to the grid, to create the desired effect of a pixel brush), to 30 pixel strokes on 3000 pixel canvas. I like what i am doing, and can make another larger printable version. Only to find that vectoring and keeping color is impossible. I just recently made an entire '8-bit' art project, spent days on it.

I am not entirely sure what the point of a pixel brush is, when we are not able to utilize the grid to keep everything square.

Square pixel brush photoshop