If you have already Google+ plus account, then if feel bored with your Google+ theme/layout, you might be wondering how to change theme or layout in Google+ plus account. However there's a good news for you because now you can easily to change your Google+ plus theme/layouts using chrome plugin named Layouts for Google Plus™. This Chrome plugin will allows you to upload a background pictures/photos, you can even choose from the ones provided by that plugin which available for you.
Well, here's some examples cool themes/layouts for your Google+ account:
Once you have installed the plugin, then to change your Google Plus background to any image you want just simply click the 'Edit Background' button in the lower right corner to change your background.
To install Layouts for Google Plus™ chrome plugin click here, then to browse everyone's background images visit this link: http://www.google-plus-themes.com/