Thank you for such a prompt response.
I have already added Firebug to Firefox and exploring its interface now for a few hours.
I am just depressed that all the themes I have searched so far seem to lavish white space around the top of the web page and that it is so much effort to trim this down.
I am obviously doing something very wrong in Firebug to try and isolate the menu / title elements.
I am in HTML mode, can see the Style / computed / Layout tabs on my right, click on the Inspect button and then click on one of the menu items. All that happens is that the web page follows the menu page I clicked and so I am now on a different web page.
I have spent at least 8 hours to-day just trying to remove excess white space. I do not want to be a java or css developer. I am sure I will crack it at some stage.
Any hints will be appreciated. I have also downloaded Dreamweaver, but thought Firebug would be a quicker route to follow.