I have an Officejet Pro 8600 and like many others here, I am having a problem printing a custom size envelope (6x9). I did find that I can use the drivers for a deskjet 450 and setup my 8600 using those drivers. However, the 450 6x9 does not have a portait option in the layout.
My question is, what other hp print drivers will work in the 8600? I'm hoping one will have a 6x9 portrait layout?