SiteBuilder has a logo shown in the top left corner of its window. You can change it thus making re-branded version of the software. Combined with custom skins, this can bring very good re-branding results.
To change the logo, go to the Custom Logo page at the Components tab. There click the Browse... button and locate the file with the logo; click the Upload button to copy the image to the server. After that, click the Apply button to make your logo appear in the SiteBuilder's interface.
The Restore button serves the purpose of restoring the default SiteBuilder logo.