To change the number of contours
main topics      examples 

1    Double-click any contour area or contour line.

2    Click the Levels tab.

3    Under Contour Levels, choose one of the following:

·    Automatic to accept the default number of contour levels.

·    Number to specify the number of contour levels, then enter a number between 2 and 11.

·    Values to specify the z-values to plot as contours, then enter from 2 to 11 values.

4    Click OK.