This article is a quick easy tip for specifying a slope for a line instead of only specifying the angle. When placing roofs, floors, ceilings, pipes, etc, you have the option for specifying the actual slope, but this option is not available in other situations.
This function is especially helpful with drafting views and similar type situations when the angle of an element needs to be modified. Since angles cannot be typed/specified when drawing an element, angles are commonly modified after element placement.
Depending on the equation that you enter, you can get a riser/run slope or a percentage slope. (The angle will still be displayed.)