Xmanager supports 6 visual types simultaneously. When your video device supports more than 16-bit colors, Xmanager sets the default visual as TrueColor. Otherwise, it sets the default visual as PseudoColor. The default visual is used by the X root window and most X applications for their windows.
Some X applications such as CAD tools were developed years ago for 256-color systems, so those applications work only on PseudoColor visual, and you should change the default visual.
Xmanager emulates PseudoColor visual in a true-color video device. When Xmanager emulates PseudoColor visual, the StoreColor request is a very expensive operation that slows down performance. Therefore, Xmanager supports the full StoreColor feature optionally.
Some X applications may fail in TrueColor visual when the bit fields of RGB value are not same with a specific UNIX/Linux system. To cope with this problem, Xmanager offers an option to change the RGB format in the TrueColor visual. For more information about visual, see The Color tab.
Xmanager also supports an RGB database file which translates color names to corresponding RGB values. You can edit the color database using a text editor.