In 2005, WordPress became modular separating the design and architecture from the core programming code.

Today, a WordPress Theme contains files called template files that hold the architecture of the site and template tags, code that initiates actions within the site and data from the database. The design is applied through a stylesheet, holding the instructions for the colors, images, and look and feel of the entire site.

This tutorial covers the basics of the structure of a WordPress Theme and standard customization options.

The Structure of a WordPress Site

Like all websites today, a WordPress site contains a background area, header, sidebar(s), content area, and footer.

The background area is considered the canvas that the site’s structural and design elements rest. It is usually a solid color, pattern, texture, or a design that does not overwhelm the rest of the content and design elements.

The header area…