.LP
Selections on this pane allow the user to set the number and intervals
of contours for 2D and 3D contour plots.
If more than one plot is displayed in the plot window, the user will
be prompted for a single plot on which the operation should be performed.  
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.IP "SET Contour Info:"
This option prints out the following current contour settings for a 
selected plot.
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.RS 10
Minimum Z Data Value
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Maximum Z Data Value
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Number of Contours
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Minimum Contour Value
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Maximum Contour Value
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Contour Offset
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.IP
If only one plot is displayed in the plot window,
the settings of that plot are automatically displayed.  If more than
one plot is displayed, the user will be prompted for which plot information
is to be read in.
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.IP "Contour Settings:"
The user has the option to set the following four contour attributes.  
.RS
.IP "Number of Contours"
Specifies the total number of contours that will
be generated for a plot.
.IP "Minimum Level"
Specifies at what value the lowest valued contour will be drawn.
By default, the minimum level is set to the minimum contour value read
in by the \fBSET Contour Info\fP function.  
.IP "Maximum Level"
Specifies at what value the upper contour will be drawn.
By default, the maximum level is set to the maximum contour value read
in by the \fBSET Contour Info\fP function.  
.IP "Contour Offset"
Specifies an offset for the entire contour plot.  For
example, an offset of 10 will shift the contour 10 positive units from the 
minimum.  Since this shifts the entire contour plot, the user may
want to respecify the min/max level settings.  Changing offset will
also cause a shifting of the contour color cycle.
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.IP
Note: Changes made to the contour settings \fIonly\fP take effect after 
executing the \fBGENERATE Contours Automatically\fP, or \fBSPECIFY Contours
Manually\fP options.
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.IP "GENERATE Contours Automatically:"
This option will generate contours automatically using the values specified
in \fBContour Settings\fP.  If more than one plot is displayed in the
plot window, new contour levels will be generated \fIonly\fP for the plot 
selected from the pop-up query window.  
Contours are generated using the following equations.
.RS 10
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interval = (max_level - min_level)/num_contours
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contour level value = 
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     min_level + interval * level_num + offset
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.IP "SPECIFY Contours Manually:"
This option allows the user to specify all contours individually.  When
the user clicks on the \fBSPECIFY Contours Manually\fP button, a list
of all of the contours (specified by \fBNumber of Contours\fP option)
is displayed.  The initial contour values in this list are generated
using the same equations that are used by the \fBGENERATE Contours 
Automatically\fP option.  The user can edit this
list to set specific contour levels.  If more than one plot is displayed in the
plot window, new contour levels will be generated \fIonly\fP for the plot 
selected from the pop-up query window.
.IP "RESET Default Contours:"
This option resets the default contours on the selected plot.
.IP "PLOT Contour 3D:"
PLOT Contour 3D redraws the selected plot as a 3D contour plot.
Note that if changes have been made to the contour attribute values, the 
\fBGENERATE Contours Automatically\fP, or \fBSPECIFY Contours Manually\fP
option must first be executed to make the changes take effect.
.IP "PLOT Contour 2D:"
PLOT Contour 2D redraws the selected plot as a 2D contour plot
(a projection of the contours onto the X-Y plane).
Note that if changes have been made to the contour attribute values, the 
\fBGENERATE Contours Automatically\fP, or \fBSPECIFY Contours Manually\fP
option must first be executed to make the changes take effect.
