Canon mp280 - Manual (Page 255)

Specify a scaling factor
Directly type in a value into the Scaling box.
The current settings are displayed in the settings preview on the left side of the printer driver.
5. Complete the setup
Click OK.
When you execute print, the document will be printed with the specified scale.
Important
When the application software which you created the original has the scaled printing function,
configure the settings on your application software. You do not need to configure the same setting
in the printer driver.
When Scaled is selected, the Staple Side list box appears grayed out and is unavailable (when
Duplex Printing is not selected).
Note
Page 255 of 707 pages Scaled Printing