WHERE TO START -------------- Yay! You opened the correct file first. The first thing that people notice when they download the Zen theme is that there are A LOT of files -- way more than other themes. Don't worry! You don't need to learn everything all at once in order to make a Drupal theme. Zen will do the bits you haven't learned and patiently wait for you to discover the documentation and inline comments about them. WHAT ARE BASE THEMES, SUB-THEMES AND STARTER THEMES? ---------------------------------------------------- Often the best way to learn a system is to take an existing example and modify it to see how it works. One big disadvantage of this learning method is that if you break something and the original example worked before you hacked it, there's very little incentive for others to help you. Drupal's theming system has a solution to this problem: parent themes and sub-themes. A "sub-theme" will inherit all its HTML markup, CSS, and PHP code from its "parent theme" (also called a "base theme".) And with Drupal themes, it's easy for a sub-theme to override just the parts of the parent theme it wants to modify. A "starter theme" is a sub-theme designed specifically to be a good starting point for developing a custom theme for your website. It is usually paired with a base theme. So how do you create a theme with Zen? The Zen theme includes the Zen base theme as well as a starter theme called "STARTERKIT". You shouldn't modify any of the CSS or PHP files in the zen/ folder; but instead you should create a sub-theme of zen and put it in a folder outside of the root zen/ folder. SUGGESTED READING ----------------- Installation If you don't know how to install a Drupal theme, there is a quick primer later in this document. Building a theme with Zen See the STARTERKIT/README.txt file for full instructions. Theme .info.yml file Your sub-theme's .info.yml file holds the basic information about your theme that Drupal needs to know: its name, description, template regions, and libraries. Don't worry about all these lines just yet. Theme .libraries.yml file Your sub-theme's .libraries.yml file describes collections of CSS and JS called libraries. Don't worry about all these lines just yet. Sass Once you have created your sub-theme, look at the README.txt in your sub-theme's sass folder. Don't freak out about all the files in this directory; just read the README.txt file for an explanation. Templates Now take a look at the README.txt in your sub-theme's templates folder. ONLINE READING -------------- Full documentation on the Zen theme can be found in Drupal's Handbook: https://drupal.org/documentation/theme/zen Excellent documentation on Drupal theming can be found in the Theme Guide: https://drupal.org/theme-guide INSTALLATION ------------ 1. Download Zen from https://drupal.org/project/zen 2. Unpack the downloaded file, take the entire zen folder and place it in your Drupal installation under sites/all/themes. Alternative installation folders can be used; for more information read the sites/example.sites.php file in your Drupal installation. 3. Log in as an administrator on your Drupal site and go to the Appearance page at admin/appearance. You will see the Zen theme listed under the Disabled Themes heading with links on how to create your own sub-theme. You can optionally make Zen the default theme. 4. Now build your own sub-theme by reading the STARTERKIT/README.txt file.