Apple Color OneScanner 600/27 - Manual (Page 147)

3 Turn the Transparent Media Adapter over and unlock it.
Press the side of the switch that shows an open lock.
4 Line up the transparent media alignment guide with the two holes at the back of
the scanner.
The transparent media alignment guide comes in a separate package in the
box with the transparent media adapter.
Transparent media alignment guide
Press to
unlock Diffuser
Be careful not to mark
or scratch this surface.
139 Using the Transparent Media Adapter