There are multiple ways to add slide in PowerPoint presentation. The frequently used option is to click the New Slide button and The keyboard shortcut for adding new slides is (ctrl-m) .
The New Slide dropdown display will show you various slide layouts you may want to use.
The layout name gives you a basic idea of when to use what format. For example, you can use the Comparison slide if you wish to present two images side-by-side for direct comparison. There is space above each comparison box to provide a descriptive title, such as “Before editing” and “After editing.”
By customizing the slides in your PowerPoint presentation, you can add a unique look that reflects your personal style. Microsoft PowerPoint contains built-in tools which allow you to customize the backgrounds of your slides with vibrant colors, patterns, photos and gradients.