How To Enable Keyboard Shortcuts in Gmail
Once you become familiar with Google's Gmail, you will want to find shortcuts that make some of the repetitive clicks just go away. One easy way to accomplish this is with Gmail keyboard shortcuts.
To enable keyboard shortcuts, logon to Gmail and click on settings, then click the radio button - Keyboard shortcuts on in the Keyboard shortcuts configuration section and click on Save Changes at the bottom.
Once enabled, you will have the following shortcuts available.

