Sindoh A611dn - Manual (Page 71)

Using the Printer
3-
27
You can print on both sides of the paper. Select the binding direction of the paper before printing.
Instructions
1 Select orientation.
Image Orientation Description
1 Side Print Print on one side(general).
Portrait Typically used for books.(Turn pages by the long side)
Landscape Layout used for calendars
2 Click the paper tab to select paper size, source and type.
3 Click OK or Print before exiting the window.