What is a BRUSHCATEGORY File Type?
A category and its variations of brushes is the marker category. It contains specific brushes, such as the point marker, the leak marker and the point marker, each with its own settings to give them a different appearance.
To create a new category of brushes select Brushes; rarr; New category of brushes... name the category, and click OK.
To export a BRUSHCATEGORY file select Brushes → Export → Category... select the category from the drop-down menu, and click on "OK. Next name the file, choose the' backup location, and click Save.
To import a BRUSHCATEGORY file select Brushes → Import → Category... select the category, then click Open.