You can use filters to select all the resources that meet some condition that you specify. For example, you might want to select all your material resources. The condition in this instance—that the resource Type must be Material—is called the filter criterion. Project has a built-in filter named the Resources—Material filter that imposes this criterion for you (see Figure 8.23).
Filtering for specific resources is a great way to isolate only the resources that meet specific criteria that you’ve defined and to temporarily omit the other ones. By doing so, you can apply a change that affects an entire group of resources instead of having to find each one independently in order to make the change.
After Project selects ...