This command is used to label the slope between two particular points. The slope is calculated in terms of the variation in the heights of the two selected points.
The selection can be made from a polyline or line with variable heights of its vertices or from two points with a height that is different to zero.
Once the entities from which the height will be calculated are selected, the program will request the parameters necessary to label the corresponding text, meaning, position, angle and height of the text.