Contour lines
The contour line defines a polygonal area. When the contour line is changed,
the program regenerates the drawn existing axes accordingly.
Click Modify/Entity Edit/Axis/Contour Lines.
Determine the corner points on the drawing area by left-clicking.
Close the polygon (The polygon will be closed when you click the initial
point.)
The contour line definition will be completed.
The appearance or not of the contour lines on the screen depends upon the
choice of the user.
Click View/Drawing Aids.
The Drawing Aids dialog will appear on the screen.
Click Contour Lines from the Axis group. If it is checked it will be unchecked.
Uncheck it and click Ok to exit the dialog. The contour line will disappear
from the screen.