Originally Posted by elenasworld
I still prefer to use the adjustment layers/opacity levels for most of the photo treatments I do.
The difference between this method and using levels is it also sets your mid-tones point.
Usually in levels you move the triangles in to the edges of the graph (telling it where the darkest and brightest points should be). In curves you do that plus define the mid point so the software does the math to correctly position the values on the color spectrum.