In dreamweaver, when in code-live view goes to white space - help please

When Coding emails - Dreamweaver is great with code-live as you click a section in the email it will jump to the relevant section in the code!!

However, if the part of the live section you happen to click is a url - I think it tries to open the link, all I get is a big White space, the only way to resolve this is switching to a code-design mode - then switching back

can I turn off external URLs?? Is there a back button??

Please help as each time I have to do this it takes a good few minutes to undo....