To make any changes to the logo or site title you must be logged in as admin, or any user with the Manager role.
The logo image - logo.jpg - can be found in the skins folder of the Plone Default theme. The quickest way to replace this is simply to upload your own image and give it the same name:
This will change the title of your website that appears in the web browser.
There has been error in communication with Booktype server. Not sure right now where is the problem.
You should refresh this page.