I had this problem on Ubuntu Mate (18.04). I resolved it by deleting the okularrc file in ~/.config/okularrc When you start okular again, it will create a fresh okularrc file.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/329337 Title: Okular starts in full-screen mode, without toolbar if last used maximized To manage notifications about this bug go to: https://bugs.launchpad.net/kdegraphics/+bug/329337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs