You will also notice that there is an app.scss file in the scss folder. Let's open this up and cover what is in this file. Once this file is open, you will see on line 1 that this is where the _settings.scss file is being included. You will also notice that when referring to the settings file, you do not need to include _ or .scss. Between lines 4-40 you have a bunch of commented-out Foundation components. This allows you to only use and include the parts of Foundation you need per project. So how you use this is you comment out line 2 and then uncomment line 5, and then uncomment the lines you need in your project. Just make sure that you have a comma after each line and that you have a semicolon after the last uncommented line. By only including the components you are using in a project, you can cut your CSS files down in file size quite a bit. Only use this when you feel more comfortable with Foundation. So for this book, we will always include all of Foundation code...