Creating a sub-theme based on a core theme

This recipe details the steps involved in creating a sub-theme of an existing core theme.

Getting ready

Create a folder named mytheme inside sites/all/themes. This name is usually also the name of the new theme and it is best to keep things uncomplicated by not using spaces and special characters. While mytheme is suitable for the purpose of this recipe, it will be a good idea to give the theme a unique and pertinent name based on its design and use. It is also important to ensure that there are no name-conflicts with other existing core or contributed themes.

How to do it...

A sub-theme of a core theme can be created through the following procedure:

1. Create a file named mytheme.info inside the mytheme folder.

2. Edit this new file and add the following code inside it:

   name = Mytheme
   description = My new sub-theme (CSS, phptemplate, 3-col)
   base theme = garland
   core = 6.x
   engine = phptemplate
   stylesheets[all][] = mytheme.css
   

   Note

   It is useful to add an informative...