This could be very useful for you. You won't have to edit each post to see which template is used.
Morevover you can sort post by page template.
This section describes how to install the plugin and get it working.
- Upload the plugin files to the
/wp-content/plugins/admin-column-template
directory, or install the plugin through the WordPress plugins screen directly.
- Activate the plugin through the 'Plugins' screen in WordPress
- You'll see a new action link called "deactivate & reactivate" on each activated plugin in plugin page