SpecialHost is a utility for the previewer ShowDVI and the printerdriver DVIprint. It is started in the background additionally to the drivers and waits for messages from these programs. It enables the printerdriver and the previewer to display IFF graphics. To this end it evaluates the
special-strings. It loads pictures with the help of an IFF library and adjusts their size to the resolution of the current driver. It can also store the pictures in a manner that when called again the labour intensive enlargement or reduction do not have to be done again.