Opening and closing a pcurve

Opening a pcurve removes the span which joins the first and last points of the pcurve.

1. Select a pcurve.
2. Click on the Trim Region toolbar.

   The span is removed.

Closing a pcurve adds a span to the first and last points of the pcurve.

1. Select a pcurve.
2. Click on the Trim Region toolbar.

   A span is added.