To make changes to your website header, open your WEBSITE module.
Within the menu at the top, click on the HEADER & FOOTER>HEADER.
This will bring up your header options. The style highlighted in blue is your current selected header. To select a different style, simply click on the preferred option.
To edit the button within the header, click the edit CONTENT. This will bring up your button options.
To edit the remainder of the header, click the edit STYLES button. Make the preferred changes, and click SAVE.