Doc:Creating Shapes
(Draft) Note to the reader: This is still incomplete; please be patient.
Introduction
Basic primitives such as circles or rectangles are all great, but they are pretty much geometrically inflexible. What about shapes? To do this, we use the bline tool.
Headline
In Synfig, the construct for describing shapes is called a Bline. This is roughly analogous to a "path" in other programs, except that it is strictly a hermite spline.
When you click on the bline tool, you will see that the ducks from your currently selected layer (if there was one) will disappear, but the layer(s) will still remain selected in the Layers Dialog. This is normal. Anything you create in the bline tool will be inserted above the currently selected layer. Keep in mind that if you want to insert a shape somewhere, you should select where you want to insert it before you go into the Bline tool