We already explored the process of using a shape or another sprite as a template for brush shapes. Another way to customize the size of a brush is to define one using the New Brush button in the Paint Palette. Larger values create bigger brushes. The Aspect spin box sets the shape of your custom brush. An Aspect of 100 is a circular brush.
Lower values create increasingly flat oval shapes.
The Rotation spin box adjusts the angle of rotation of the brush you are designing. Rotation only works if you set an Aspect less than 100. The Softness spin box sets the edge softness of the brush you are designing. A setting of 100 produces an opaque, solid brush. Lower settings blur the edge of the brush strokes.