Dialog Box - called from: Input2 Menu
The best color for background may be neither white nor black - sometimes gray brings out shading and front-to-back fading better. The background for black-and-white display and output is always white.
Using colors other than white, black or gray for background may result in increased size of Raster or bitmap files and PostScript files in 3D Drawing Modes. In some cases a simple run-length-encoding method is used for compression of these files, and this fails for 24-bit RGB (true color) files when the three components are not identical. That is, for a row of white pixels the sequence of bytes is 255, 255, 255, 255... whereas for a row of red pixels it is 255, 0, 0, 255, 0, 0...