Oce CS120 Reference Manual page 60

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This copier supports many functions.
To find the right function for your particular needs or to find a simple description of a
function, press (Guide) while the Basic Features screen or Special Features screen is
displayed. The Guide Menu screen appears on the touch panel display as shown below.
Example: When making copies of photo originals
Press [Various Originals].
You can display simple explanations on the various types of originals using [ ] or [ ].
Press [Done] to return to the Various Originals Menu screen. To return to the Guide Menu,
press (Guide).
Universal Functions