White balance eyedropper
The white balance eyedropper is the tool you use to click on a neutral grey or white point in your photo to set white balance automatically. The software then works out temperature and tint so that point becomes truly neutral. It's the fastest way to remove a color cast.
Click on something that should naturally be grey or white: a white wall, a grey paving stone, the white of someone's eye. Avoid very bright or blown-out spots, because they give an unreliable result. If you had a grey card in the shot, that's the ideal click point. Treat the eyedropper as a starting point, not the finish line: adjust by feel afterward.
Related terms
Prefer a look in one click?
The presets on this site set these adjustments up for you as a starting point, which you then fine-tune to taste.