Canon PC880 Operator's Manual page 24

To load LTR and LGL size paper in the cassette
Removing the Stopper
1. Remove the cassette from the main unit, and remove all loaded copy
paper.
2. Unlock the locking levers on the width guides ( ), and bring the width
guides to the center ( ).
MEMO:
The stopper is mounted at the inner side of the cassette.
3. Slide the stopper toward the width guide while pushing down on the
protruding part with one hand (as shown in the figure), and push the
stopper up from the rear side of the cassette with the other hand.
4. Remove the stopper as shown in the figure.
5. Align the width and the length guides with the LTR or LGL marks and lock
the locking levers on the width guides.
6. Load the copy paper. (See p. 20.)
NOTICE:
When loading A4-size paper, first reinsert the stopper into its original position.
Copying without reinserting the stopper will cause a paper jam.
Inserting the Stopper
1. Insert one of the claws into the groove as shown in the figure.
2. Insert the other claw into the notch in the groove.
3. Slide the stopper towards the inner side as far as possible to lock.
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