OpenWritings.net

In this tutorial, we will create a sub-theme of the Garland theme.

1. Create a directory for your sub-theme(e.g. .../sites/all/themes/mySubTheme)
2. Create an .info file for your sub-theme(e.g. .../sites/all/themes/mySubTheme/mySubTheme.info)
   

   name = Mysubtheme
   description = A tutorial showing how to create a sub theme.
   core = 6.x
   engine = phptemplate  
    

3. Add the following line in your sub-theme's .info file to declare that your theme is the sub-theme of another.
   

   base theme = garland
    

4. You have to at least add a stylesheet to your sub-theme. Otherwise, your sub-theme will not inherit any of the parent theme's stylesheets. Therefore,
   create an empty css file(e.g. .../sites/all/themes/mySubTheme/AtLeastOne.css) and then add the following in your .info file.
   

   stylesheets[all][] = AtLeastOne.css  
    

In general, your sub-theme will inherit pretty much everything of the parent's theme(e.g. stylesheets, javascripts, Template.php, *.tpl.php, etc) and you will be able to override them too. For more details, see Sub-theme structure and inheritance.

Click on the mySubTheme.zip to dowload the complete theme of this tutorial.