[NTG-context] How to change the page size for single pages within a document

Hi all, is there a possibility to change the page size of single pages in a document. Reason: I have a document that contains some large tables that do not fit on normal pages. Therefore I would like to output such tables on a page of their own having the neccessary size. (Of course the documents are not ment to be printed. They are to be viewed with Acrobat.) Thanks for your attention, --Stefan