I have a Canon MP990 printer and when need help with printing from the rear tray when using Aperture 3.3.2. I specifically want the rear tray because that is where I load the photo paper.
I just found the answer....
Once you're in Aperture and you select File>Print Image>
Then select Print to move to the next page
When this pop-up box appears you will see " Layout ", when you click on this you get a drop down list
Select Quality and Media, this is where you select the paper source.
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