How do you reset your factory settings for calibration?

I calibrated it and now I hate it. The photographs are all messed up and everything is darker than it used to be. I really want to reset it to what it was when I bought it a year ago. I don't know what to do. Please help!!!!

Use the File/Find... command within the Finder and search on the term "windowserver". Finder should find files like com.apple.windowserver.plist and com.apple.windowserver.xxxxxxx.plist where xxxxxxx is a string of numbers and letters. Throw all such found files in the trash and restart the Mac.
The discarded files will be automatically recreated by OS X when it restarts and discovers them missing. The newly created files will have factory default values, meaning a clean start with all display devices that have ever been attached to it, including the built-in display. If you have done calibrations for other (external) monitors, those will also be lost and have to be redone.

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