In this quick tutorial, I show you how to very easily transform a picture into a negative in Lightroom. It is quite straightforward, so I will just include a couple of screenshots.
First, you need to turn on the ‘edit point curve’ on, by clicking on the bottom-right icon in the curve panel.
Then grab each little square at the extremities of the curve (actually, a straight line at this point) and revert the curve by bringing the left one to the top, and the right one to the bottom. That’s it!
The exact same technique can be used to turn a negative into a positive.
To apply the effect to other images even faster, you can create a preset, as I show in this short tutorial video: