Line Perpendicular panel
Use the Line Perpendicular function to create a line perpendicular to existing entities. You can create the line by selecting the first endpoint on an existing line, arc or spline and then sliding it into the position you want. You can also create a line that is both perpendicular to a line and tangent to an arc. To use this mode, you must have at least two entities in the graphics window, and one of them must be an arc.
