[john.gersh]

Thanks for the link, pjp. Unfortunately that tutorial doesn't cover making adjustable shapes, like the block arrows. In fact the Adjustable Arrow, for example, doesn't appear in the shapes.graffleshapes file. The adjustable shape name strings do appear in the Graffleshapes Framework binary file, so they seem to be hard coded rather than defined in a text file. I guess that's not surprising. The action of the adjustment handles is unique to each shape; it can only be specified functionally. (Think of the adjustable star: moving one handle in an arc changes the number of points.)