Brushes panel
Hovering over the Brush button

The Brushes panel: the list of brushes, with the first one selected

When it appears

Hovering over the Brush button. The brush library.

Fields

FieldWhat it does
Listone item per brush, with its stroke sample; click = pick up that brush

Detaching it

Drag its header and the list detaches and stays open; you can resize it, and its × puts it back under the button.