With this feature...
Do this...
map name
Select a map layer to display including those based on reservoir properties.
show color fill
Clear to make the background transparent. You can set the background color fill by clicking the Set Bkg Color button on the Map > Map Features dialog box.
color for min z 
color for max z
Change the colors that appear on either end of the map spectrum.
color range method
Accept AUTO SPECTRUM or select USER MIN MAX and modify the min max values to focus on Z-values like reservoir properties or elevations.
show contours
Clear to hide contour lines or select and in the minor and major contour step boxes, type value at which to display successive contour lines.
use only wells with digital logs
Select to map wells with loaded digital curves or digitized raster logs.
ignore deviated wells
Clear to display deviated wells.
map scale
Type a larger number to compress map detail and reduce the overall map size.
show well with TD below
Select a formation above which not to display wells.
ellipsoid
Select an ellipsoid (for Canada, select GRS80).