The Eyedropper Tool defines the foreground / background color.
- In the Toolbox, select the Eyedropper
Tool. - Click somewhere on your image to define the foreground color. Look how foreground selector on the Toolbox changes.
- Alt-click (click holding down the [Alt] key) to set the background color. Look how the background selector on the Toolbox changes.
- On the Options bar you can change sample size (the Eyedropper's range). The Point Sample picks up the color from the pixel you click on; 3 by 3 and 5 by 5 read average values from larger areas (movie).

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