Canon imagePRESS C1+ Reference Manual page 457

6
Remove the two blue screws on the outer size change plate using a
coin or something similar.
IMPORTANT
Do not loosen or remove any screw other than the two blue screws on the outer size change
plate. If you loosen or remove any other screws, you may need to adjust the width between the
size change plates. (See "Size Change Plate Width Adjustment," on p. 4-84.)
7
Lift up the outer size change plate.
8
Align the outer size change plate with the marks for the desired paper
size that you want to load.
12 18
12 17 5 / B4
16
305 457 B5
mm mm
305 440
mm mm
A3
11 17
A4
LTR
Paper Deck-AA1 (Optional)
7
7-23