.CONTOURING?(Y/N): Y
[Enter whether or not contouring is desired.]
[The file will then be printed (with overprinting) to the results file, with 5 levels of contouring. If contouring is not desired, then an 'N' should be entered. Note that as in all 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.]