Canon 3749B002 On-Screen Manual page 346

Use normal-size printing
Print without reducing the page.
Use reduced printing
Reduce the page slightly during printing.
5.
Specify the side to be stapled
The machine analyzes the Orientation and Page Layout settings, and automatically selects the best
Staple Side. When you want to change the setting, select another value from the list.
6.
Set the margin width
If necessary, click Specify Margin... and set the margin width, and then click OK.
7.
Complete the setup
Click OK on the Page Setup tab.
When you execute print, duplex printing will be started.
Performing Duplex Printing Manually
You can perform the duplex printing manually.
1.
Open the printer driver setup window
2.
Set duplex printing
Check the Duplex Printing check box and uncheck the Automatic check box on the Page Setup tab.
3.
Select the layout