My apologies, “not create a number of pages” was a typo that should read “to create a number of pages”. To clarify, I did create a selection of pages to populate the menu.
I also had difficulty working out how to specify the menu width, and how to make the dropdown go to full width. There does not seem to be anything either in the settings or the documentation which shows how to do this, as with the sample menu.
I shall look into putting up a live version of the site, however the base url already has my existing site for which this was to be a replacement.