Hi. I'm trying to print on A7 envelopes on an ip8720 from a macbook pro. A7 is not available in the preset drop down and the custom size is grayed out and not available. A7 is 5.25" x 7.25" so it meets the minimum size requirements I believe, but it's not available. I tried uninstalling and reinstalling the printer driver, but that did not work. Any thoughts?? TIA!
