I have a customised master page and a number of websites underneath it.

Is there any way, that I can control the width of the underlying-webpages, so that they are identical to the width, of the main masterpage?

(Currently, their widths, are not identical, to the width of the masterpage, despite going into the 'Modify Site Settings' section and setting wepages to be identical to the actual customised masterpage).

Regards,

Dan