Dell 2100MP User Manual page 4

Connection Ports
Remote Control
3 Keystone adjustment
4 Temperature warning light
5 Lamp warning light
6 Re-sync
7 Menu
8 Keystone adjustment
9 Source
1 VGA in (D-sub) connector
2 VGA out (monitor loop-through)
3 IR receiver
4 USB connector
5 S-video connector
6 Composite video connector
1 Light
2 Power button
3 Previous Page button (page up)
4 Four Direction buttons
5 Source button
6 Resync button
7 Keystone Correction button
8 Zoom in/out
9 Hide button