The right-hand part of Photo Lab is the Post processing area. Here you can find features that let you put that extra effort into your photos by fine tuning them or adding different effects.
All post processing is performed on rendered images, so make sure that the photo you wish to work with is displayed in preview area and has a green frame around it.
Below, you will find links to each of the features in the Post processing area. Each feature is explained step-by-step, and examples are provided on how to use it. It is important to remember that all the different features interact to create a photorealistic image.
From the Advanced mode, you can also switch to the Simple mode from the orange triangle drop-down menu, or from the bottom of the Post processing section: