Change the Default Eye-dropper Sample Setting
The sample size of the Eyedropper tool (I), found in the Options Bar, controls the size of the area that's evaluated when it provides color and tonal feedback, but it can also a?ect how certain selection tools workâ”e.g., the Magic Wand or the Color Range command. The default Sample Size value is Point Sample, which samples a single pixel; however, this isn't ideal for photo-graphs, where using 3 by 3 Average or 5 by 5 Average will give you better results.