MICHAEL ZHANG, PETAPIXEL:
RGB Curves can be an intimidating photo editing tool that’s difficult to wrap your mind around, but they’re powerful and worth learning. Photographer Conner Turmon made this helpful 8.5-minute video that explains how tone curves work and how you can use them to create professional-looking photos.
The tool is available in both Photoshop and Lightroom (and most serious photo editing apps), so this tutorial is relevant regardless of which program you’re using.
Read more, here.