That takes me back! I seem to remember the ability to print graphics from an Apple IIe depended on the the grahics interface card. I used to have one called a "Grappler" and it allowed printing of graphics. I don't remember the codes, but I remember printing all kinds of graphics. There was software called "Printshop" that allowed the layout and printing of graphics on greeting cards, posters and banners. This software used the graphics card. While I think of it, there was an intergrated package called Appleworks that had word pro, spreadsheet and database. Clipart was available to insert into text. Charts could be done in the spreadsheet and inserted in word pro. I could print all this on my 9-pin DMP.
Here is a link to a pdf of the Grappler manual.
http://apple2online.com/web_documents/grappler__printer_interface_-_user__s_guid e.pdf
Have fun.
j