There are a couple of ways to create your own shapes, but only two are preferred. Unfortunately, the easiest way, using binary operations on shapes (which is covered in a later section) is only available in OmniGraffle Pro.
Using this tool requires some planning ahead as the shape you'll create will be a closed shape from the start. This can be very confusing—and of all the tools available in OmniGraffle, this is the most difficult one to use.
This tool will let you draw both straight lines and Bézier curved lines. You learned about the characteristics of Bézier lines in Chapter 2, Stencils
You can start the creation of a new shape by clicking on the canvas where you want the starting point of your shape to be. A good starting point can be an angle, the start or ending of a curve – really any place not in the middle of a curve or a straight line.
There are four basic operations in creating new shapes, straight lines, curved lines and undoing your...