Understanding Curves

Curves are one of those tools that I could not retouch any photos without. I use it to add contrast, to recover and enhance highlight, to remove and add shadows, add colors and for many other applications.

With lots of functionality, a curve is one of the most versatile tools in Photoshop and yet a lot of photo retouchers and photographers tend to avoid it.  I still remember how overwhelmed I became in my early Photoshop learning when I finally figured out this great tool.  I wanted to write an article about it and did some quick Google search on