To create a user-defined shape based on an existing parametric shape, repeat the previous steps. After clicking Compute, select the Free Shape type in the General Shape tree. Instead of having a list of shape specific parameters displayed, a tabular editing control is displayed. The cells represent the x, y coordinates of the points making up the polyline representing the shape. There are a tools bar buttons to add, insert and remove points or clear all entered data.
Note that you do not have to base a user-defined shape on an existing parametric shape. You may go directly to the Free Shape type and enter data from scratch.