WordPress Version 3.1 “Reinhardt” was released On February 23, 2011 to the public, Named in honor of the jazz guitarist Django Reinhardt. With new features. This post will describe all the new features.
WordPress 3.1 New Features
1] Internal Linking
Click a button for an internal link and it allows you to search for a post or browse a list of existing content and select it for inclusion.
2] Admin Bar
Contains various links to useful admin screens. By default, the admin bar is displayed when a user is logged in and visiting the site and is not displayed in admin screens for single blog installs. For multisite installs, the admin bar is displayed both when visiting the site and in the admin screens.
3] Streamlined Writing Interface
New users of WordPress will find the write screen much less cluttered than before, as more of the options are hidden by default. You can click on Screen Options in the top right to bring them back.
4] Post Formats
Meta information that can be used by themes to customize presentation of a post. Read more in the article Post Formats.
5] Network Admin
Move Super Admin menus and related pages out of the regular admin and into a new Network Admin screen.
6] List-type Admin Screens
Sortable columns for list-type screens and better pagination.
7] Exporter/Importer Overhaul
Many under the hood changes including adding author information, better handling for taxonomies and terms, and proper support for navigation menus.
7] Custom Content Type Improvements
Allows developers to generate archive pages, and have better menu and capability controls. Read more in the article Post Types.
8] Advanced Queries
Allows developers to query multiple taxonomies and custom fields.
9] Refreshed Blue Admin Color Scheme
Puts the focus more squarely on your content.