Samsung MultiXpress X703 Series User Manual page 56

Loading paper in the tray
Do not overload the tray: it may cause paper jams. Make sure that the paper
is below the maximum paper capacity guide inside the tray.
1
1 Paper capacity guide
8 Fix the the paper length guide using the locking switch. Release the
locking switch to load a different sized paper.
1
1 Locking switch
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2. Media and Tray