You can keep it at the top of the request by changing the request properties. That is the only way as far as i know. Otherwise go with a page option on the top of the report by making it as a pivot view. I mean user can select the page numbers from the list..
check this blog..
Thanks AJ, however I'm rather looking for a solution which can be applied to all reports, therefore it needs to be a change to the 'paging control' definition or xml file config. Where it needs to be changed and whether it's possible to change the setting directly via config files, is what I'm really after.