Overview of theme files
A theme is a collection of files that define the presentation layer. You can also create one or more "sub-themes" or variations on a theme.
Writing theme .info files
The .info file is a static text file for defining and configuring a theme. Each line in the .info file is a key-value pair with the key on
Default .info values
The following are the assumed defaults. When they are not defined, the theme will automatically take these values.
Assigning content to regions
If none are defined, the following values are assumed in Drupal 6.
Checking to see if a region is occupied
While theming page.tpl.php it's possible to check to see whether a region is empty, by checking the content of the relevant variable which
Theme settings
Various page elements output by the theme can be toggled on and off on the theme's configuration page.
Global Settings
Next to List, select configure. This will show the global theme settings option where you can toggle the display of features supported by
Integrating color module
Color.module allows the admin to change the color scheme of a theme. By selecting a palette of colors (either from a set or by hand), you
Creating a sub-theme
Sub-themes are just like any other theme, with one difference: They inherit the parent theme's resources. There are no limits on the
Clearing the theme cache
The contents of the .info file is cached in the database, so altering it will not be noticed by Drupal. Also if you add new tpl.php files or
Sub Theme - Inheritance Summary
In the previous section, we understood how a sub theme is created along with inheritance of various properties. The table summarises
Example: Creating a Garland Subtheme That Utilizes the Color Module
Let's say you want to use Garland as your base theme, but want to be able to make CSS tweaks to it and want to keep the Color module
Working with CSS
Working with CSS in Drupal 7.
Working with JavaScript and jQuery
Using JavaScript adds dynamic presentation effects to a theme. In addition to custom JavaScript files many Drupal developers find jQuery
Using Newer Versions of jQuery
You will often need a newer version of jQuery to use a certain jQuery plugin. There are several ways to achieve this.
Core templates
Core comes with a number of default template files. You can override these templates in a number of ways.
Template (theme hook) suggestions
A theme hook suggestion is an alternate template (.tpl.php) file that you have created to override the base or original template file.
Theming blocks
Theming blocks in Drupal 7 individually, by region, or by module.
Advanced theming
Advanced theming in Drupal 7.
Overriding themable output
Overriding themable output in Drupal 7.
Creating accessible themes
This guide provides a guide to accessibility best practices for theme developers.
Theming HowTos
Theming HowTos for Drupal 7.
Tools and best practices
Best practices and conventions for theming Drupal 7.
Upgrading 6.x themes to 7.x
NOTE: We are now using a different system to track version-to-version changes in Drupal. Most of the theme changes between Drupal 6 and