To update an existing brush, click the Update button. The changes are applied to the brush icon that you selected to open the Custom Brush menu.
To create a new brush, click the New button. This creates an icon for the new brush shape and adds it to the Brushes window.
Custom brushes are not saved automatically when you exit Paint. To save the updated or new brush for use in another work session, click the Save button. This opens the Brush setups directory. Use the keyboard to enter the name of the brush, and click the Enter button. The new brush is saved in the Brush setups directory.