Perpendicular Snap

Toggles the Perpendicular Snap on or off. When set to ON, you can snap a new entity that you are drawing to point perpendicular to another entity. You can snap a new entity to a point perpendicular to an arc, circle, line, Polyline, and infinite line. To use this choose 'Settings Menu > Snap > Perpendicular snap' or select  icon  from snap toolbar.

To use Perpendicular snap

See Also