You can isolate x- or y-coordinate of a point in the coordinate system through the input field (you turn the input field to the submenu show).

1. The entry may be a separate item or a portion of, for example, a polygon.
2. If, for example, the point labeled A, so can the input field and write

   x(A)

   or

   y(A)

3. This gives respectively. x- and the Y coordinate of the point, which then can be used as variables. (Heal Maerk the algebra window)

Tip! This can be used, when, for example, will calculate the slope / tilt century, calculate where something is from, for example, the x coordinate of a point or calculate something different from a point.