I created a new preset brush from an existing brush, but now I want to delete it. Can't find any way to do this. How can I delete my custom brush?

Hi calwas

To delete a brush simply do the following:

1) Go to choose brush preset pannel ( click on the icon marked in red in this image)

2) Select the thumbnail of the brush preset that you want to delete and press the red trash can icon at the bottom of the panel.