Canon iR3245 Manual page 384

2. Select the desired margin type.
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3. Select [Front Side] or [Back Side] → press [-] or [+] to set the margin
width → press [OK].
If you are using the Margin and 2-Sided Printing modes together and printing a document that already has
a margin, set the Margin mode for the back only.
If you are using the Margin and 2-Sided Printing modes together and printing a document that does not
have a margin, set the Margin mode for both the front and back.
If you enter a value other than 0, you can switch between positive and negative margin width by pressing
[ ± ].
Example:
To enter values in inches, press [Inch].
4-130 Margin Mode
( ＋ ) 10 → [ ± ] → －10
－50 → [ ± ] → ( ＋ ) 50