Contour Range

To customize the contour range:

Select the Custom Range checkbox in the Contour Options dialog.
Enter the desired minimum and maximum values. (DO NOT ENTER ZERO AS A MINIMUM VALUE, SEE NOTE BELOW).
If necessary, enter the desired number of intervals, to obtain evenly numbered contours.
Select Apply or OK.

NOTE:

When entering a custom Contour Range, you must enter a NON-ZERO MINIMUM VALUE, since contouring in Dips automatically begins at zero. For custom contour ranges, the FIRST interval is always from ZERO to the user-defined MINIMUM value.

Remember that the number of intervals entered in the Contour Options dialog INCLUDES the first interval (ZERO to the MINIMUM), and also the > MAXIMUM interval, if present. To obtain evenly numbered intervals, you will have to adjust the number of intervals accordingly. This may take some trial and error, use the Apply button to see the results without closing the dialog.