In this video tutorial the instructor shows how to perform basic lighting corrections in Adobe Photoshop. The levels tool is the Photoshop's most used command which has many features to it. Its most basic function is as a lighting correction tool. In this video open an image and work on its adjustment layer so that you do not damage the original picture. Now choose the levels option by right clicking and it shows a pop up window which contains a histogram which shows the population of the colors in your picture. Using this tool you can control and change various color settings as shown in this video. This video shows how to use the Levels tool in Photoshop to control the lighting in images.