[Perpendicular 2] command generates a line that is normal to existing 2 curves.
For the prompt
"Specify a point on a curve"
, mouse-click around the start point on a
curve.
For the prompt
"Specify the end point on another curve, that is perpendicular to the curve."
mouse-click around the end point of the perpendicular that is on a different
curve from the curve of Step 1.
After the click, a successful process of the command will generates a perpendicular.