Oftentimes when working with themes and plugins, you’ll want to be able to easily find the ID for a post, page, category, etc. Now you can add IDs into the dashboard with the new WP Show IDs plugin. It’s both handy and elegant and will probably save you a bit of time if you often find yourself hunting for ID’s. Simply install and activate and ID’s will appear as shown in the screenshot below:
WP Show IDs also supports WordPress 3.0+, even Custom Post Types & Custom Taxonomies, as well as Multisite installations.