Epson 4500 - Manual (Page 116)

Graphics
The dot graphics mode allows your printer to produce pictures, graphs,
charts, or almost any other pictorial image you can create.
Because many commercial software programs use graphics, you may be
able to print pictures and graphs like the ones on this page and the next
by simply giving your software a few instructions.
The quickest and easiest way to print graphics on your printer is to use
a commercial graphics program. With such programs you usually
create an image on your monitor then give a command to send the
image to the printer.
If you use commercial software that produces graphics, all you need to
know about dot graphics is how to use the software. The application
program will take care of the printer. (Some programs call this bit
image printing.) On the other hand, if you wish to do your own
programming or merely wish to understand how this printer prints
graphics, read on.
Software and Graphics 4-9