David ... I am not sure what the capabilities are of a "large format printer", but here is what we have done. I have Adobe Distiller (makes Adobe files as if it were a printer) and make large charts using PAF Companion. For example I have a chart that is 24 inches wide and 80 inches long. it has 9 generation the largest of which is 62 people. I then take these files to a print shop vender for printing. They usually have a printer that uses rolled paper 36 inches wide and as long as you like.