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Look for the selection that resets the camera to factory default settings. Return all of the settings to known state, so that you do not get surprise behaviors due settings and programming from the previous owner. When you buy a used camera it is a good idea to reset the camera back to factory defaults. You select what OS you have a download the software for your OS. From there you can download apps, manuals, firmware, and stuff. You can visit the Canon Support page for your camera model. It is like typing on a Blackberry, which is slow on a camera screen. You can enter or change copyright info from the menu system.