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Using Color Samplers

You can use the Eyedropper tool in the Tools panel to check pixel values in the Info panel. But when you’re comparing or tracking the pixel values of two or more areas in an image, it’s not really possible to keep moving the mouse back to the exact same position every time. Fortunately, you can drop up to four color samplers on the image. Each sampler stays in place and continuously reports the underlying color values in the Info panel, as I did back in Figure 7-31.

You can select the Color Sampler tool in the Tools panel, but you may not have to. If you’re using the Eyedropper tool, temporarily enable the Color Sampler tool by holding down Shift; for example, Shift-clicking adds a color sampler. If you’re using a painting tool you can temporarily enable the Color Sampler by pressing Option-Shift (Mac) or Alt-Shift (Windows).


  

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