At present the LG system has only been written for X-displays where the default colour mapping method, or ``visual'' (in X-11 terms), is an 8-bit plane ``PseudoColor visual''63 or 24-bit plane ``TrueColor'' (V9.136). Unfortunately 24-bit ``TrueColor'' graphics is handled in a very complicated manner in X-11 and there are many possible combinations of bit and byte ordering. The output has been tested on eXceed and LAN Workplace Pro X-servers in 24-bit mode, and a number of Unix workstations, but it may not work properly on some other systems. Other types of colour mapping can now be added with reasonable ease, since they are related to one of the above choices e.g. a 16-bit plane ``TrueColor'' system could be added, but still this involves a variety of changes to the source code, and needs testing on such a system. For this to be viable I need access to such systems at the ESRF.
If the default is not suitable a detailed error message will be output explaining the characteristics of the default window.