Introducing "selection calculations"

In this exercise I am going to introduce you to the basic selection calculations…that are available to you inside Photoshop.…Now I don't want to scare you with the term calculations, there is no…math involved here.…These are merely ways to add to existing selection outlines, subtract from them and so forth.…And they are ultimately ways of combining selections so that you can create more complex ones.…Now notice up here in the options bar we have four icons right at the outset…when you're using any one of the selection tools that we've seen so far.…The first icon is the one that's selected by default, it says New selection.…

So any time you drag or click with a tool you're going to create a new Selection Outline.…Next we've got one that allows you to add to an existing selection, or you can…subtract from that existing selection and finally you can find the intersection…of two selections and I'll show you what that looks like in just a moment.…But in the meantime, let me tell you that you're much better off learning a few…