Apologies for what I am sure is a stupid question, but I have a query over the page widths. My website is http://www.letournoi.co.uk and has been working with Twenty-Ten theme for past year. I publish a lot of HTML pages (as I cannot find a better way of converting spreadsheet data to display with correct formatting etc), and have always had issues with getting the html page to be thin enough to display correctly.
I recenlty changed to twenty-twelve, and it has got worse - I think because the width has changed from 640 to 585 in the new theme (found here http://wpbtips.wordpress.com/2009/07/23/maximum-image-width/).
I think the answer may be around child themes, from some other info I have found, but my CSS/PhP knowledge is non-existent, and I am getting confused. I wonder if someone could help a simpleton with what he is trying to do.
Here is an example of where I want the entire page displayed without having to scroll:-
I may be better using a different theme - if someone can suggest something with similar characteristics (i.e. photo on every page as header, widgets, etc) then I am more than happy to test it. I just cannot find one!