Use odd-number brush sizes ( 1, 3, 5, 7… ) when drawing single-pixel-width lines – they center correctly on the cursor. Even sizes work better for filling or erasing.
Click the brush icon in the top toolbar → drag the Size slider (great when you need an exact number). aseprite brush size
Struggling to find the right pixel brush size without interrupting your flow? Here’s how to control it like a pro: Use odd-number brush sizes ( 1, 3, 5,