Click the arrow next to the brush sample to display the
pop‑up palette in the options bar; choose a category from the Brushes
pop‑up menu, and then select a brush to modify in the brush list.
Use the options bar to modify the original brush.
Click the arrow next to the brush sample to display the
palette menu, and then choose Save Brush.
Enter a name in the Brush Name dialog box and click OK.
The new brush is selected in the options bar, and is
added to the bottom of the brushes pop‑up palette.