4
Theming
The most obvious part of Drupal’s theming system is the Appearance admin page found at admin/appearance, which lists all the themes installed on your website:
Figure 4.1: Appearance admin page
When you choose a theme from the Appearance page, you are applying a specific graphic design to your website’s data and functionality. However, the applied theme is in reality only a small part of the entire theming layer.
This book focuses mostly on building modules that encapsulate chunks of functionality. However, since we’re ultimately building a web application, everything output by our functionality will need to be marked up with HTML. ...
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