Prior to 2.7 a “Turbo” button at the right top corner of the admin dashboard. Just click that and if you had Gears installed you were good to go. In WordPress 2.7 the “Turbo” button has been removed. To enable gears login to your Admin section and go to the Tools. Once there you have the ability to use Google Gears to make WordPress work in a “Turbo” mode.
How to enable Google Gears in WordPress 2.7