Opens a window used to draw a custom defined elevation contour interval.
Enter the interval in meters for the contour lines.
Toggles the line thickness. Bold is a thick line.
The lines can be added or multiplied.
Line colors can be set according your requirements.
Restores all settings to default values.
Draws the contour lines as set on the current map window.
A example where elevation contour is used in combined Bold and normal lines. Elevation cuntour is shown in 10 m interval with normal lines and 100 m interval with Bold lines.