The Shape Primitive is bezier based free shape primitive.
Creating Shapes* Select 'Shape' tool (keyboard Shortcut 'S'). The cursor change to Shape mode.
* Add points by LButton Press&Drag
*Close figure. If you click the first point (small rect with (X) indicated), the shape will be closed.
* Now, new shape is created.
Editting ShapeFor Editing Shapes, select 'Edit Shape' from Right-Click Menu.
Each control points can be moved by dragging.
Non-smooth vertex is created by SHFT+drag,
For deleting a point, Use 'Del Point' from Right-Click Menu.
For inserting a point, Press SHIFT and click new location. the point will be added to the next to current focused point.