Canon imageRUNNER C3125i User Manual page 580

<I-Fax Settings>
Configure settings to print received I-Fax documents.
<Print on Both Sides>
Specify settings for printing received document on both sides of paper.
<Off>
<On>
<Menu>
<On>
<RX Print Size>
Specify the paper size to be used for printing.
<A4>
<A3>
<B4>
<B5>
<305x457mm>
<8K>
<16K>
<LTR>
<LGL>
<EXEC>
<11x17>
<Menu>
the paper size
*1
<Fax Settings>
Configure settings for receiving and forwarding faxes.
<Print on Both Sides>
Prints received document on both sides of paper.
<Off>
<On>
Setting Menu List
<Function Settings> <Receive/Forward>
<Function Settings> <Receive/Forward>
<I-Fax Settings>
<I-Fax Settings>
571
<Print on Both Sides>
<RX Print Size> Select