Controlling contrast and brightness with Curves
Controlling brightness and contrast is the most basic thing that you can do with Curves. You're probably thinking why would you want to do this when you have a perfectly good brightness and a contrast slider in the exposure adjustment?
There are a couple of reasons. First of all, the sliders in the exposure brick behave differently than the Curves tool. Also, you may want to brush a brightness adjustment in at some point and you can't brush the exposure adjustment in, so it's useful to know how to do it with Curves. Let's start with brightness as it's the easiest.
Controlling brightness with Curves
Start by adding a Curves adjustment from the Add Adjustment pop-up menu. Add a point in the center of the curve and then carry out the following steps:
To increase the brightness in the image drag the point up, as shown in the following screenshot:
To decrease the brightness drag the point down, as shown in the following screenshot:
Note
You may be wondering...