Canon IR3250 User Manual page 87

When the Stack Bypass is Registered for a Function in Additional Func-
tions
If the paper size and type have been registered
as described in "Setting Up Standard Stack
Bypass Settings" (see the Reference Guide),
place the specified size and type of paper in the
stack bypass, and press the [Stack Bypass] key
in the Paper Select screen.
When Placing Paper in the Stack Bypass and Using Existing Settings
Press the [Stack Bypass] key on the Paper
Select screen.
2-28 Selecting the Paper Size (Paper Select)