Note that if the layout is currently applied to any slides, like this Title Slide layout or this Title and Content layout, you can’t delete it. This simplifies what you are working with and helps keep the file size smaller. To delete a layout you don’t need, select it, and press Delete.
One thing you’ll see is that PowerPoint provides many default layouts, probably more than you’ll need. Let’s do more with customizing the slide master by customizing master layouts.
