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Review

Review questions

1Describe the similarities and differences of the Clone Stamp tool, the Spot Healing Brush tool, the Healing Brush tool, the Patch tool, and the History Brush tool.
2What is a snapshot and how is it useful?

Review answers

1As you paint with the Clone Stamp tool, it duplicates the pixels from another area of the image. You set the sample area by holding down Alt (Windows) or Option (Mac OS) and clicking the Clone Stamp tool.

The Spot Healing Brush tool removes blemishes and imperfections from a photograph. It paints with automatically sampled pixels from an image or pattern, matching the texture, lighting, transparency, and shading to the pixels being healed.

The Healing Brush tool works like the Clone Stamp tool except that Photoshop calculates a blending of the sample pixels and the painting area so that the restoration is especially subtle, yet effective.

The Patch tool works like the Healing Brush tool but instead of using brush strokes to paint from a designated area, you drag a marquee around the area to be fixed and then drag the marquee over another area to mend the flawed area.

The History Brush tool works like the Clone Stamp tool except that it paints pixels from a designated previous state or snapshot that you select in the History palette.

2A snapshot is a temporary record of a specific stage in your work session. The History palette saves only a limited number of actions. After that, each new action you perform removes the earliest item from the History palette list. However, if you select any action listed in the History palette and take a snapshot of that state, you can continue working from that action or another one. Later in your work session, you can revert to the state recorded by the snapshot by selecting it in the History palette, regardless of how many changes you’ve made in the meantime. You can save as many snapshots as you please.

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