So far, we've already covered what you need to build a basic site in the look you desire. In concrete5, you'll find more elements like blocks and something called single pages. You can build all of that on your own, but sometimes you just want to make sure that the existing single pages match the look of the theme. An example would be the page shown if the requested page couldn't be found—the so called "404 error" page.
In this chapter, we're going to look at these pages and make sure they match the look of your theme. We'll cover the following topics: