Sony HDPS-M10 Operating Instructions Manual page 12

Locking the Controls (HOLD)
You can lock the controls to prevent accidental button presses while carrying
the device.
Slide the HOLD switch in the direction of the arrow to lock the controls.
To unlock the controls
Slide the HOLD switch in the direction opposite to that of the arrow.
Opening/closing the covers
You can open/close the port and slot covers the same way.
To open the covers
Lightly push down the top part of the cover to open it, as illustrated.
To close the covers
Push the cover up from its fully open position, until the tab of the cover fits
into the notch of the body. Then, lightly push up the cover until you feel it click
into place. When it does, the cover is securely closed.
12
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Slide the HOLD switch in
the direction of the arrow.
Click