-Executes the wizard starting from the given page, returns {\tt TRUE} if it was
-successfully finished or {\tt FALSE} if user cancelled it. The {\it firstPage}
-can not be {\tt NULL}.
+Sets the page size to be big enough for all the pages accessible via the
+given {\it firstPage}, i.e. this page, its next page and so on.
+
+This method may be called more than once and it will only change the page size
+if the size required by the new page is bigger than the previously set one.
+This is useful if the decision about which pages to show is taken during the
+run-time as in this case, the wizard won't be able to get to all pages starting
+from a single one and you should call {\it Fit} separately for the others.