Curve menu

•Increase degree: Increases the number of control points without changing the shape of the curve.
Note that all inner points will be rearranged.

•Remove inner control points: Removes all inner control points of the control polygon so that the Beziér curve reduces to a line.

•Split curve: Subdivides the Beziér curve into two curves while keeping the shape of the original curve.
Note that inner points will be rearranged and that splitting can not be reverted.

•Offset curve: Applies an offset to the curve underneath.
Splitting curve before can increase accuracy of the resulting offset curve.

•Duplicate/ Copy/ Save curve: These general features are described in the topic Graphical dialogs.