What is a film repairman in the studio?

Hello, the so-called film retouching is to use photoshop and other software to deal with the defects of photographers' photos. Generally, there are always some flaws after taking photos in the studio, such as wrinkles on the skin, acne on the face, or the color of the photos. To put it bluntly, it is to fix these defects with software. If you want to be qualified, you must first use photoshop skillfully, and then you can know how to repair the photos. The typesetting work at the end of the book is all film retouching.