While not containing any new features per se, the Calibre 2.83 update is here to improve various of the built-in functionalities, such as the PDF Output, which now defaults to generating PDF documents that have a page size of letter instead of fetching the size of the page from the output profile. Separate, PDF and DOCX page margin settings were implemented as well to override the standard ones, which appear to be useful due to the fact that the page margin settings for page oriented formats are normally different than those that are available for reflowable formats like EPUB.