Download the theme. You can find themes on http://drupal.org/project/themes, as well as some external sites. Make sure the version of the theme matches your version of Drupal.

Which files are required for theme in Drupal?

Drupal 7.info (required) All that is required for Drupal to see your theme is a . info file. template files (.tpl.php) These templates are used for the (x)HTML markup and PHP variables. Sub-themes. On the surface, sub-themes behave just like any other theme.23 Dec 2016

What are the installed Themes?

The installed theme can be described as follows: It usually includes the graphical control elements, the fenestration, and the window is a collection of shapes and colors. It is used to adjust the look and feel of a computer or an operating system.