Line > Perpendicular (Draw Menu)

This command draws a line which is perpendicular to a line, circle, or ellipse of any type. This line is drawn so that it appears as a right angle in the current view.

Any part of an existing object can be used as a reference object. This can be a rectangle side, the arc of an ellipse segment or a circle arc within a surface.

The identified object is referred to as the "Reference Object". After identification, a straight line showing the line of the perpendicular appears. This is referred to as the "Reference Straight Line"

The position of the perpendicular is determined by a reference point through which the reference straight line should run. This reference point can be entered by clicking the mouse at any point within the drawing.

The start point of the line can be entered by clicking the mouse anywhere in the drawing. A perpendicular is dropped from this position to the reference straight line to determine the start point of the new line.

The end point of the line can be entered by clicking the mouse anywhere in the drawing. A perpendicular is dropped from this position to the reference straight line to determine the end point of the new line.

The line is assigned to the current layer. In addition, it contains a reference to the current pen.