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Review

Review questions

1What does resolution mean?
2How can you use the Crop tool when retouching photos?
3How can you adjust the tonal range of an image?
4What is saturation, and how can you adjust it?
5Why would you use the Unsharp Mask filter on a photo?

Review answers

1The term resolution refers to the number of pixels that describe an image and establish its detail. The three different types are image resolution, monitor resolution—both of which are measured in pixels per inch (ppi)—and printer, or output, resolution, which is measured in ink dots per inch (dpi).
2You can use the Crop tool to trim, scale, and straighten an image.
3You can use the black, white, and gray triangles below the Levels command histogram to control the midpoint and where the darkest and lightest points in the image begin, thus extending its tonal range.
4Saturation is the strength, or purity, of color in an image. You can use the Sponge tool to increase the saturation in a specific area of an image.
5The Unsharp Mask filter adjusts the contrast of the edge detail and creates the illusion of a more focused image.


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