I found that tray that stand up right work better for your papers because all colors are easy to get to, and they donít have as many bent corners. The tray that lay flat you have to take out all the colors to get the one on the bottom and they take up much more space. I donít have enough room to have a tray for every color or that would be ideal, so my colors are mixed and the stand up trays work great to get your papers out fast and easy without damaging any other sheets.