4.6 The background

The background color may be specified by =background_color(color). The color argument may be any of the color specification described in the section with the =setcolor command. In case you wish to control the color of corner of the background, you may use the =background_vertex_colors(cll, cll, cur, cul) command where ci denotes the color of vertex vi. Again, the four color argument may be any of the color specification described in the section with the =setcolor command.

A background image is loaded using either =background_image(file) (assumes that the image match the geometry of the presentation), =background_image_stretch(file) (stretches the image to fill the background) or =background_image_tile(file) (tiles the image to fill the background).

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