Canon S750 - S 750 Color Inkjet Printer Application Manual page 122

2
Click the ROTATE button to display a submenu, and select one of
three options, 90 degrees right, 90 degrees left, and 180
degrees, as needed.
3
According to the option you selected, the image is rotated.
Note
When you select one of the options other than the Custom layout printing, only
the 180 degrees option is available. When the current layout is the Index printing,
all image rotation features in the Print window are disabled.
Editing the layout format 122