.NUMBER OF LEVELS: 5
[Enter number of contour levels. Note that
as in other SPIDER contouring programs (e.g. "FC"), the
levels of maximum and minimum OD are counted as contour
levels. In the above example, only three contours would
be visible, plus the two points where the maximum and
minimum of the image are assumed.]
[The file will then be printed (with overprinting) on the
terminal, with 5 levels of contouring.]