Customize your gmail look within a minute now you can put your own background picture in Gmail Look make your gmail more impressive. you can also import picture from Google+ or you can import picture from your computer.
How to :
Open up your gmail account go to setting or click on gear icon and click on themes.
there you can saw many pics and have option to import background pictures. choose any one of theme and click apply.
That’s it you have done you changed your gmail look now have fun with gmail.
Check out the Video on YouTube.