In this tutorial, we'll show you how to place Print This Post buttons into WordPress posts and pages. The main reason you'd want to do this is to extend a courtesy to your readers. Many of them still print things they read online and you don't want them to waste that expensive printer ink just to print your logo and theme as well as the post.
Without this solution, you'd likely need to create a separate CSS file with styles specifically for the printed page. Fortunately, the WP-Print plugin makes this much easier. It will automatically create a printer-friendly version of each post or page.