Hit the "Menu" button on the back of the camera. The first item on the screen is "Digital Zoom". The default setting is "Standard" but if you click to the right and you'll see where you can select "Off".
Go to the CanonUSA website and download the pdf with the detailed 140 page owners' manual. It explains how to do ALL of the settings on your camera. Work you way through the manual with the camera in your hands, and practice each of the settings. Learn how to set the ISO level, the contrast level, the color saturation level, and most importantly, how to make an exposure brighter or darker.
By the way, for normal size prints, a 3 meg setting produces great results. For an 8 x 10 enlargement, a 6 meg setting is a bit better. There is ZERO need to take photos at a 10 meg, 12 meg, or 14 meg setting unless you entend to heavily crop the photo and then enlarge the crop.
The photo quality is so similar that even an 8 x 10 enlargement is unlikely to show a difference. The SD1300 uses cheaper materials, and looks and feels cheaper. If the price was similar, the SD940 is a good buy. Today, there is a $60 difference between them, making the SD1300 the better buy.