Use the Contour page to control the contour attributes of the active slice group (determined by the number buttons on the top of the page).
The following options are available:
• Show Contours - Select this check box to show contours.
• Contour Type - Select the contour type from the drop-down. Lines, Flood, Lines and Flood, Average Cell Flood, and Primary Value Flood are available.
• Flood by - If you chose contour flooding, select the contour group by which to flood, or RGB flooding.
• 
Icon - Use this button to bring up the Contour & Multi-Coloring Details dialog.
• Contour Lines by - If you chose contour lines or lines and flood, select the contour group by which to draw the lines.
• 
Icon - Use this button to bring up the Contour Details dialog.
• Line Color - Choose the line color in the Color Chooser. Multi-Color will color the slice contour lines based on the contour group variable.
• Line Thickness - Specify the line thickness as a percentage of the frame width. You may enter a value in the text field, or choose one of the values in the drop-down.
• Use Lighting Effect - Select this check box to enable the lighting effect drop-down menu where you may choose "Paneled" or "Gouraud" shading. See Section “Translucency and Lighting” for more details on lighting effects.
• Use Translucency - Select this check box to enable the surface translucency text field, where you may set the surface translucency from one (opaque) to 99 (translucent).