To create a new Save & Share an Event button, you need to click on Installation, scroll down to "Install Save & Share", click Add , the select the Save & Share Event option.

On the next screen under the heading "Configuration" on the left, you have options to customize the name, features, event specific information, and GPS coordinates of you button.

Under the "Personalization" section on the left side you have even more customization options for the image that shows up as your button and more advanced options such as dialog box information, user interaction, supported languages, and integration with Google Analytics.