Canon NP6551 Operator's Manual page 70

Press the key.
5
Start
■ If you placed your original on the platen glass
After the first original is copied, the message as
shown on the right appears in the touch panel
display.
Place the second original, then press the
key.
If you set the Two-sided, Overlay, Image
Combination or Image Separation mode in step
1 without setting the stack bypass size, the
stack bypass size entry screen will appear. If
this screen appears, select the copy size placed
in the stack bypass. Then, press the [OK] key.
MEMO: ●
After the copy paper has been placed, you can
program the copier to display the stack bypass size
entry screen. If you enter the copy size before
copying, Auto Paper Selection and Auto Zoom can
be used with the copy stock placed in the stack
bypass. (See "Stack Bypass Size Setting," on p. 4-9.)
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