There are plenty of references in the forums about using the histogram to correct under and overexposure, and contrast. Here is a group of useful links to get you started and take the most out of this essential tool. Most are already in the forums, but I thought of consolidating all here for easier access.
Guide by Paul Nichols (referenced by Brian here). Probably the best one.
Histogram. RGB or Luminosity? (referenced here)
https://web.archive.org/web/20160430093101/https://www.workshopsforphotographers.com/photo-imaging-tips-techniques/reading-histogram
The Basics of Histograms for Beginner Photographers (Shared by Alex)
Histograms. Youtube video covering camera exposure and post-processing usage of histogram.
I hope this helps.
-cq
Guide by Paul Nichols (referenced by Brian here). Probably the best one.
Histogram. RGB or Luminosity? (referenced here)
https://web.archive.org/web/20160430093101/https://www.workshopsforphotographers.com/photo-imaging-tips-techniques/reading-histogram
The Basics of Histograms for Beginner Photographers (Shared by Alex)
Histograms. Youtube video covering camera exposure and post-processing usage of histogram.
I hope this helps.
-cq
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