1 BLANKING
        BLANKING

    Modifies the blanking value of an image.  This operation cannot  be done
    through  the  HEADER  program, which only modifies the blanking value of
    the header...
2 Y_NAME$
        TASK\FILE "Input file name" Y_NAME$

    The name of the input image (with old blanking value)
2 X_NAME$
        TASK\FILE "Output file name" X_NAME$

    The name of the output file (with modified blanking value)
2 BLANKING$
        TASK\REAL "New blanking value" BLANKING$

    This is the new blanking value
2 TOLERANCE$
        TASK\REAL "New tolerance on blanking" TOLERANCE$

    This is the new tolerance on blanking.
1 END