*See updates at bottom to find more ways to restore Gmail Interface
Recently Gmail rolled out a new interface for all it’s users, however, unlike earlier, they haven’t provided a prominent option for users to switch back to the Old Gmail interface.
The new interface includes an enhanced contact manager and some enhanced visual changes. However, change does not go down very well with many people, and unlike other email providers, Gmail does provide an easy way to switch back to the older interface.
In order to switch back to the old Gmail interface or completely get rid of the new Gmail interface, scroll down to the bottom of the Gmail webpage and click on the “older version” link to switch back to the old Gmail interface.
Yes, it was as simple as that. So if you had problems with the new Gmail interface click the link and you will be taken back to what you like. Have fun.
Update: Clicking on the older version link takes you back to a very old version without Gmail Labs support.
Though completely switching back to the old interface is not possible yet, you can use some Greasemonkey scripts to get back some of the old Gmail interface back. Please note that Greasemonkey scripts will work out of the box on Google Chrome and with the Greasemonkey add-on on Firefox.
Tools/Scripts to Get Old Gmail Interface Back
Remove Remove Left Menu – This userscript will remove the tasks link from the sidebar and only retain the Mail and Contacts link. it also compacts the left menu to use lesser space and removes unwanted CSS from it. Download the userscript.
More scripts will be added once we come across them.
Update 11/02/2011: Learn how to switch back to Old Gmail Interface in the newest update from Gmail.
Update: 04/20/2012: Check out a new way to restore Old Gmail Interface using a Stylish script.