Freehand & Brush Tool - Select Brush
This lets you select from the library of brush shapes. These can be either predefined or you can create your won - see Creating a brush.
The first item in the library is always a plain line (no brush stroking). Following this are the most recently used brushes; this makes it easier to select your favorite brushes.
You can also view the library in the Line Gallery.
See Changing the brush stroke for details of using brushes.
Note:
Applying a brush removes any arrowhead/tail or dash pattern already applied to the line.