In many cases, there is a need to perform operations only on certain parts of an image. In fact, this is one of the most common tasks in the digital processing (editing) of an image. The possibility to perform operations only on certain parts of the images enables you to perform accurate editing operations only on those areas needed without having to change the rest of the image. The program contains many tools and functions that enable the selection of an area on the image. An area selected is called a Selection. The selected area is represented by a broken line called Marquee. The part within the selection is called the Selection Area. After the selection operation, it is possible to edit the selection area, copy it, cut it, delete it, move (drag) it to another location, and many other operations. Controlling the selection tools and the selection functions is very important and essential to successful editing works (tasks, operations, etc.).