hello, I have had the printer for a short time. I needed to print on the back of an already printed sheet (to fill it up). I used the feed on the back of the printer, however it printed using a sheet from drawer nr 1 as normal. I have read online that if a sheet is inserted on the manual feed (on the back) it should pick it up automatically. In the menu on the display I cannot find or know where to change a set-up. In my opinion, however, the printer should take the sheet automatically. Thanks