Keyboard shortcuts can be used to speed up the process of building a figure. The segment button shortcuts are shown in the button mouse over hint messages and are as follows:
C - add a Circle
L - add a Line
K - change segment Kind
F - change circle Fill
D - Duplicate
Up/Down arrow keys - change segment thickness
S - remove / restore handle (Static / dynamic)
O - set Origin joint
Insert key - split segment (Insert joint)
Delete key - Delete segment
keys - Adjust window transparency
Shortcuts can also be used with the Ctrl key to Undo / Redo or Save the figure type. These are also shown to the right of their menu items.