Then come into the image and click and drag around the area that you want to remove from the selection. How do you subtract from a selection? For that, go up to the Options bar and click on the next icon the Subtract from selection icon here. Now, let's say that you go too far - like this. If you don't get it all you can come in and Add to the little bit that you didn't get the first time. Click the Add to Selection option in the Options bar and then come into the image and click inside the top right corner of the existing selection and drag to encompass more of the building and the parking lot too. Let's say we want to Add to our selection to include the entire building. You'll use these often and you'll find them in the Options bar for many of the selection tools. There you'll find an icon for Adding to a selection and one for Subtracting from a selection. Before we do that take a look at the Options bar for this selection tool. If you were to do something to the image now like make an adjustment it would appear only inside the area defined by the 'marching ants'. They're sometimes called 'marching ants'. The animated lines you see represent the edge of the selection. Click on that tool and then move into the image and start at the upper left corner of this building and click and drag out a rectangular selection of part of the building and include the parking lot below too. This tool is used to make rectangular and square shaped selections. So, let's just use the first selection tool in the Tools panel. We're not focusing on selection tools in this video. Let's jump right in and make a selection. You can follow along with this image from the practice files for this tutorial. In this video, we'll cover some basics about working with selections. Whether those involve making an image adjustment, applying a filter, painting or lots more. Once you've made a selection only the selected area will be impacted by your edits. So, you can make adjustments to that part, or work on only that area. A selection is a way to isolate part of an image.
You may have heard of selections, but you may not know exactly what they do.