This widget allows users to create various Icons as well as four basic Shapes: Rectangle, Polygon, Circle, and Line. Click + (W) in the widget bar and select Shape.
You can change the attributes of your Shape in the widget controls on the right side: change Color and Weight for Borders, set Radius, add up to 30 sides for the Polygon, and change Weight and Stroke for Line.
In addition to the four basic Shapes you can also add Icons to your page. Select the Duck shape in the Settings, pick one of the icons from the list, or search for more symbols.
You can also add icons using the Button widget.