In this tutorial, we will take a close look at the selection tools available in Pixelmator and will explain how to use them. Pixelmator is an easy-to-use, fast, and powerful image editing app for the Mac. We will dive deeper into a very important part of image editing; making selections. Selections tell Pixelmator what part of the image you want to edit. Everything that is outside the selection will be ignored. There are a wide range of selection tools available.
I've always liked this tool, because it allows you to keep the majority of an image the same...but if you want say a dress a different color. Boom! It will be that different color without messing up your selected section.