Not until I took this class. I "played" with curves but never really knew what I was doing to my picture nor did I understand how moving my curve a certain way would affect my picture. She explains how adding a curves layer can take your picture to the next level and how to accomplish that. It was helpful to see how she applies what she is teaching on student provided pictures. Excellent teacher, excellent class. I would recommend this to anyone wanting that wow factor to their pictures!