Select a painting tool or editing tool,
and click the Brush Preset pop‑up menu in the options bar.
Select a brush.
Note: You can also select a brush from the Brushes
palette. Be sure that Brush Presets on the left side of the palette
is selected to view the loaded presets.
Change options for the preset brush.
Diameter
Temporarily changes the brush size. Drag the slider or
enter a value. If the brush has a dual tip, both the primary
and dual brush tips are scaled.
Use Sample Size
Uses the original diameter of the brush tip if the brush
tip shape is based on a sample. (Not available for round brushes.)
Hardness
Temporarily changes the amount of anti-aliasing for the
brush tool. At 100%, the brush tool paints with the hardest brush
tip, but is still anti-aliased. The Pencil always paints a hard
edge that is not anti-aliased.