
You can use the color wheel to assign the types of color gradient, which are Solid Color, Linear and Radial Gradient. Open up the select combo box for available choices. And whenever you alter an existing gradient, this will go into a history list which will also appears in the selection box as an add on choice.
Pencil Icon - Stroke/Line
Bucket Icon - Fill
Both stroke/line and fill colors are supported in AddinMedia graphic and text. In the color wheel, you can select one of these types by clicking on the desired box.
Use the stroke thickness box, to assign a specific thickness to your editing graphic.