Many digital cameras allow you to select from a choice of image resolutions. Shutterfly recommends that you always use the highest resolution setting that your digital camera allows if you plan to make prints. Similarly, many digital cameras also allow you to choose the amount of JPEG compression. The compression levels are frequently listed as Normal or Basic, Fine, and Superfine (or sometimes High Quality).
Shutterfly recommends either the Fine or Superfine setting; using the Fine setting will reduce the file size at the expense of slightly reduced image quality. The specifics of setting the digital camera resolution and JPEG compression level can be found in the user manual for your digital camera.
For large-format prints (11x14, 16x20, and 20x30), you can help to ensure the best possible print by using an image that is 3 megapixels or larger.