When applying edits, you've got the original image open in its own panel to compare changes when you select the 'Before/after layout' in the Preview menu. Zooming in and out of the opened image is a great way to improve detail and sharpness by having a finer look at the pixels in the image. The cropping and perspective tools are a good way to straighten out images, remove areas of a photograph or just to slightly change how the image is perceived. The application has a few editing functions for images for adjustment and perfecting raw images such as brightness and contrast, tone curve, color, white balance and auto lighting optimizer. You can toggle which images are being viewed in the Edit menu by toggling 'Select RAW images only'.
Though the application was obviously created for dealing with those who do raw shooting, the program can also edit and manage photos that were just shot in plain JPEG or TIFF. Digital Photo Professional (DPP) is an photo management and conversion utility for dealing with images from many models of Canon digital SLR cameras in CR2 raw format.
