Photoshop - In The Beginning Part 3
In Part 3 - Mark discusses the Zoom tool and its options, as well as understanding File Size, Saving File Options plus he looks at the different jpg quality and compression. Last but not least he shows you how to accurately set your contrast whether you are working with a calibrated monitor or not. Plus he touches on Destructive and non Destructive changes to an image.
Part 3 includes - Zoom Tool, Levels, File Sizes, Tiff, jpeg, PSD, RAW files, Adjustment layers.