Rescuing Poorly Exposed Photos with Photoshop Levels. Exposure may be the most common problem in photography.
Whether your image is underexposed (too dark), overexposed (too bright), or just washed out in a hazy low-contrast fog, improper exposure can ruin an otherwise good shot. Even though many basic photo-editing programs provide “Brightness” and “Contrast” controls for tweaking exposure, I prefer to use Photoshop’s Levels tool, because it provides more precise fine-tuning, and it gives you separate control over the shadows, highlights, and midtones in your photo.
You can access the Levels tool in Photoshop under Image > Adjustments > Levels — but I don’t recommend doing it that way. Computer Arts. Biol 1406- Biology I Interactive Tutorials.