How to restore Okular default (toolbar) settings I've somehow managed to remove the toolbar and menu-bar from Okular. After I've found no way to reactivate them from "outside" – sice I can't click on Options anymore – I've tried to reinstall a clean version after removing it with `apt-get remove --purge okular`. However, it didn't work, the tool- and menu-bars were still unavailable. I also looked for any configuration files in the home directory, without success. How should I proceed now in order to restore a clean Okular.

So you have to open Okular **without** any document and right-click on the background surface of where the document is normally shown (for me grey). If -- and only if -- the toolbars are not visible you will provided with a context menu with the option to show the bars.