Hi Estanislao, LEVELS is not a PPLUS command but a qualifier on the Ferret plot commands which use color palettes. (PPLUS in its original form did not have color-filled plots, but only line, vector, and contour plots.)
The LEVELS settings are documented here: http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/customizing-plots/CONTOURING#_VPINDEXENTRY_852 The same options and settings apply to FILL, SHADE, POLYGON and RIBBON plots.
Ansley On 7/21/2017 7:44 AM, Estanislao
Gavilan Pascual-Ahuir (PGR) wrote:
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