Are you talking about the user manual? It won't help you very much. Photoshop has gotten extremely complicated over the years and reading a manual will not teach you how to use it. Days of manuals are over - there are help files - which are exactly what their name imply - help for how to use a specific tool or something similar. I recommend Lynda.com to get started. My library offers free subscriptions - see if yours does, too.
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