How to Make Sure a File is 300 dpi?

Resolution is measured in dots per inch (dpi). Picture printouts and most things that are measured using resolution will be measured in dpi. Even some televisions and computer screens are measured using dpi. In order to have a high-resolution picture, resolution needs to be set at 300 dpi or higher. Setting the resolution to 300 dpi can be done in a few short steps.

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Open Adobe Photoshop.

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Click the drop down menu labeled "Image."

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Click on "Image Size" in the drop-down menu.

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Type "300" in the dpi box under the label Document Size.

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Click "OK."

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Go to the drop down-menu labeled "File."

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Click "Save" to save the file with 300 dpi.