Canon imageRunner 400 Reference Manual page 62

Changing the Copy Ratio (Enlarging/Reducing Originals)
Specifying the Copy Ratio by % (COPY RATIO (S))
2–20
1
Place your original and press the [ZOOM] key.
2
Press the [MULTI-PG ENLARGE] key.
3
Press the [COPY RATIO(S)] key, then press
the [OK] key.
4
To set the XY copy ratio to the same
copy ratio, press the [ZOOM] key. To
set the XY copy ratio to different copy
ratios, press the [XY ZOOM] key.