Insert an envelope to define a boundary for a manifold or a system.
1. Click Circuit > 
Envelope on the HyDraw® CAD ribbon menu.
The Specify first corner point prompt displays.
2. Select the first corner point on the drawing.
The Specify other corner point prompt displays.
3. Select the other corner point on the drawing.
The envelope is inserted.
Smart envelope has following functionality:
Insert ports automatically on the envelope line intersection with connection lines.
Ports automatically inserted on envelope line intersection.
Hanging connection lines automatically deleted during automatic insertion of ports on the envelope line.
Envelope line is made of polyline and can be easily re-sized by the Resize handle.
External ports are glued to the envelope and relocates the ports and maintains connectivity while resizing the envelope.
Envelope data is attached to the envelope line.