The following URL is a link directly to Canon’s website where the provide excellent tutorials for how to deal with photos in the post production phase.
Excerpt from Canon.Com below:
Canon’s Digital Photo Professional (DPP) is a powerful, free* software application designed for editing, organizing, and processing Canon RAW files. This software is easily integrated into an existing workflow with other editing programs, such as Adobe® Photoshop®.
Learn how to use the latest version of DPP from renowned photographer and Explorer of Light Eddie Tapp. His comprehensive tutorials will give you new insights into the capabilities and potential of Canon’s RAW workflow solution.
Learn about the new and improved features in DPP v3.11 with four new videos about the HDR tool, the Compositing Tool, Digital Lens Optimizer, and more.
* Digital Photo Professional comes bundled free with the purchase of Canon EOS Digital SLR, and select PowerShot, cameras.