The Select tool allows you to select a specific part of a picture or image. It gives you the ability to draw a shape or outline around the area you want to manipulate. Once selected, you can perform various actions on the selected area, such as altering it, changing its visibility, or inserting another image into the picture. The Select tool is commonly found in image editing software like Photoshop or graphic design programs. To use the Select tool, you typically need to click and drag your mouse cursor to create a selection around the desired area.