Thanks for the response. Cntrl and Shift work to constrain the object while re-sizing when it is just selected, normally. But I want to be able to re-size a pentagon--making the 'base' thinner and the 'top' wider. I selected it with the shape tool so that I could work on individual sections, but when I try to drag a node, the edges of the entire shape misform. I'm not sure how to re-shape a shape.
Bookmarks