Dell 3000cn Color Laser Printer User Manual page 70

Long Assumes binding along the long edge of the page (left edge for portrait orientation and top edge for landscape
Edge orientation). The following illustration shows long-edge binding for portrait and landscape pages:
Short Assumes binding along the short edge of the page (top edge for portrait orientation and left edge for landscape
Edge orientation). The following illustration shows short-edge binding for portrait and landscape pages:
NOTE: When you print on both sides of postcard-size paper, make sure the paper is not curled.
Using the Center Output Tray
The center output tray holds up to:
250 sheets (20 lb (75 g/m
20 sheets of transparency: or
20 sheets of label: or
10 sheets of envelope
2
)) of plain paper: or