Sony VAIO VGN-AR200 Series User Manual page 109

To slide out and secure the size adjuster
1 Use a coin or similar object (1) to unscrew the screw (2) on the bottom of the multi function bay docking station (3).
2 Adjust the position of the size adjuster (4) to match the size of your computer.
3 Tighten the screw on the bottom of the multi function bay docking station.
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Using Peripheral Devices