MAP_POLAR /STEP

        [ADVANCED\]MAP_POLAR  GenericBegin  [GenericEnd]  [/BACKGROUND  Type Min
    Max] /STEP Step [Xfirst Yfirst]

    Specify the Step in pixels between adjacent display of polarization vectors.
    If not specified, or if 0, Step is empirically derived from the angular res-
    olution.

    Xfirst and Yfirst indicate the starting pixel along the X and Y axis respec-
    tively, allowing a controlled centering of the vector  distribution  on  the
    background image.

    Type,  Min, and Max, like Step, Xfirst, Yfirst are "sticky" (remanent): they
    keep the previous value until a new one is specified, or are reset to  their
    default  values by use of the /COMPUTE option.  Default is 0 for Step, 1 for
    Xfirst and Yfirst.