There are two different looks or templates that can be used on your site. One has a full width static banner on the homepage and the other has a scrolling slideshow.
To edit a full width banner, make sure you are logged in and click the edit pencil beside the text.
From there you can edit the heading, subheading, button text, link and photo/graphic (see below for how to update image on Site Design).
The ideal image dimensions for the full width banner is at least 1500px wide.
To edit the banner image, click 'Customize Header' found in the bottom right of every header
To update the text click the 'edit text pencil' found beside the headline
To edit the front page scrolling slideshow click here.