Aspose.Words.Layout.PageLayoutCallbackArgs class. An argument passed into [IPageLayoutCallback.notify()](../ipagelayoutcallback/notify/#pagelayoutcallbackargs) To learn more, visit the [Converting to Fixed-page Format](https://docs.aspose.com/words/nodejs-net/converting-to-fixed-page-format/) documentation article.... pageIndex Gets 0-based index of the page in the document...