How do I fix an image that's too dark?

- Sometimes when I shoot, I tend to underexpose…just a little bit.…This is a safety thing, so I avoid overblowing details…or getting areas that lack any information whatsoever,…but an underexposed image can look a bit muddy.…Let me show you.…Let's click on the next photo here,…and if you look at the histogram,…you can see that it's really quite dark.…Let's turn off the before and after split.…I'll just click the first button here…to back to the normal image.…And looking at the histogram,…you can really see what's happening.…Don't be afraid to click the Auto button.…

It'll often jumpstart things,…but now you need to evaluate what's happening.…Things look pretty good,…but some of the brightest areas lack detail.…So I'm going to pull down my highlights…to recover that detail,…and you see that the rock texture comes back into play.…However, I'd like the clouds to go whiter,…so I can move the white slider in the opposite direction…to lift that.…Looking at my exposure clipping indicators,…that's what these two triangles are,…