Apple ColorLaserWriter 12/600PS - Manual (Page 229)

Using the standard paper cassette
The standard paper cassette holds up to 250 sheets of paper. You can fill the
cassette with U.S. letter-size paper (or A4 paper, depending on the type of
paper cassette you have). You can use plain paper, letterhead paper, or three-
hole punched paper. To refill the paper cassette, insert paper as shown in the
following illustrations.
Load three-hole punched
paper with the holes toward
the back of the cassette.
Load letterhead paper face up.
Make sure paper fits under
these corner brackets.
You can push the paper down,
but don’t overload the cassette.
ABC
Do not stack paper
higher than this point.
Slide paper under the retainers.
205 Loading Paper