Autodesk AUTOCAD 2006, Command Reference Manual, Page: 134 / 1490

Gradient
Specifies a two- or three-color gradient background. Use the color controls
and Horizon, Height, and Rotation to define the gradient.
A three-color gradient is the default. To create a two-color gradient, set Height
to 0 so that Render uses only the Top and Bottom colors.
Image
Uses a bitmap file for the background.
Merge
Uses the current image as the background. This option is available only when
Viewport is selected as Destination in the Render dialog box. See RENDER.
Colors
Sets color for a solid or gradient background.
Adjust Bitmap
Displays the Adjust Background Bitmap Placement Dialog Box.
AutoCAD Background
Uses the current background color. Available only with a solid background.
This option is on by default.
Color Controls
Controls whether the red, green, blue (RGB) color system or the hue,
lightness, saturation (HLS) color system are used. Select RGB to adjust the
individual red, green, and blue components of the selected color. Select
HLS to adjust the individual hue, lightness, and saturation components of
the selected color.
Find File
Displays a standard file selection dialog box. Use this dialog box to select
the background image file to use.
Find File
Displays a standard file selection dialog box, in which you can select the
background image file to use.
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