Users can now work on two or more PDF documents simultaneously side-by-side, and even keep the app opened in various spaces. The update allows the use of multiple windows on the iPad, one of the key features of iPadOS 13. That is the first significant update to the app since the launch of its seventh version. PDF Expert 7 from Readdle, one of the most popular PDF managers for iPhone and iPad, has been updated today with multiple windows on iPad, Dark Mode, enhanced markup features, and more. Following the release of iOS 13 and iPadOS for all users, several developers have already updated their applications with compatibility with the new features.