You can change your Image logo and sitename styling in the Design panel.
1. Select the Design tool from the gray navigation bar. Under the Sitewide section in the right-hand menu, click on Header & Logo.
2. Select and Upload your image/graphic logo in the blue upload box under the Logo menu.
OR
3. Under the Sitename menu, choose one of over 100 Adobe TypeKit fonts and style the text name of your website.
4. Select Save and Publish to take your changes live!