Set of brushes
The Tools Panel has a set of brushes for the Brush, Pencil, Erase, Replace Color, Clone Stamp, and Healing Brush tools.
The size of the current brush can be changed using the keys "[" and "]".
The key for creating a brush and the key for editing the current brush launch a dialog which allows the user to make necessary brush settings.
Diameter is the width of a brush (varies from 1 to 1000 pixels).
Hardness is the value given in percentage of a brush diameter (varies from 0 to 100%). It determines the size of a nontransparent trace of a brush.
Angle is the angle of a brush slop.
Roundness. The bigger the value, the closer the shape of a brush trace to a circle. The brush leaves a round trace when the value of roundness is 100, and a line when the value is 0.
Spacing. The bigger the value, the bigger the distance between the traces of a brush.