I don't think the roll holder is motorized, so I guess simply loading anything in the back slot and selecting "roll" would do the trick - it is the same slot as the sheet feeder so I don't see a problem with any width down to the stated 8.3" for the minimum sheet width (although that too may be incorrect). I'll load a narrow strip or two later today and see what happens...
Correct. I just heard back from HP, and you can use any roll (or sheet) width as long as it is greater than A4/Letter.
So tell us how the experiments go.
author, "Mastering Digital Printing, Second Edition"
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digital printing and imaging consultant