- Curves can best be described as Levels on Steroids
- This is an Adjustment Layer.
- You can make all you adjustments on the selected layer.
- But once committed you can't re-edit this layers.
- You have to start over.
- You can reset your changes by holding Alt and clicking on Cancel Button.
- A second window will open if you click Options
- Hard to believe but in Levels there are 1.3e +12 combinations of settings
- In Curves there are 3.2e+616
- There are whole books written about Curves so I will end this mini tutorial here.