Resolution
Resolution is the density of detail in an image expressed in terms of pixels per inch (ppi). Higher resolution means better quality prints and increased capacity for enlargement. But it also means larger file sizes that are more costly to create and more difficult to manage.
The options for resolution are Standard, High, and Pro (slides & negatives).
Standard Resolution is suitable for slide shows, email & web applications, and photo-quality printing without enlargement.
High Resolution is best for archiving and enlarged photo-quality printing.
Pro Resolution is for large format printing and high-end graphics work. Pro resolution is relevant for slides and negatives and not for prints - although 1200dpi resolution is available for prints as well.
It may be advantageous to scan at High or Pro resolution even if you don't plan to make enlargements. More resolution gives you reserve should you need to zoom in or enlarge a portion of an image. Also, note that an image's resolution can easily be reduced, but it can never be increased without rescanning.
For relative file sizes for different resolution, compression levels, and image formats, please refer to the resolution table.
