Under Installation, scroll down to "Install Save & Share" and select Add, and from the drop down menu that appears select Save & Shara a URL.

On the next screen titled "General" on the left, you have the ability to name your button, add feature, add a URL, and to leave a brief description of the URL for your clientele.

Under the "Personalization" tab on the left you have the ability to change the default image that represents your button and some other advanced options regarding the dialogue box, user interaction, supported languages, and integration with Google Analytics.