What are the different types of annotations for Okular?
Okular has two different kind of annotations: Text annotations like Yellow Highlighter and Black Underlining for files with text like e.g. PDF. Graphic annotations like Pop-up Note, Inline Note, Freehand Line, Highlighter, Straight Line, Polygon, Stamp, Underline, Ellipse, and Typewriter for all formats supported by Okular.
How to save an Okular document as an archive?
Okular has the “document archiving” feature. This is an Okular -specific format for carrying the document plus various metadata related to it (currently only annotations). You can save a “document archive” from the open document by choosing File → Save As and selecting Okular document archive in the Filter selector.
Where can I find annotations on a PDF file?
Using the context menu either in the Annotations view of the sidebar or in the main window you can open a Pop up Note for any kind of annotation and add or edit comments. Annotations are not only limited to PDF files, they can be used for any format Okular supports.
How to make an annotation on the keyboard?
This is done by either selecting → or pressing F6. Once the annotating toolbar is shown, just press one of its buttons or use keyboard shortcuts (keys from 1 to 9) to start constructing that annotation. The annotating toolbar helps you to make annotations with drawings, shapes, and text messages.
How to restore Okular default ( toolbar ) settings?
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. The keyboard shortcut to show/hide the menu bar is Ctrl-m. I found the config file where the setting is stored at ~/.config/okularrc.
How can I save a document in Okular format?
You can save a “document archive” from the open document by choosing File → Save As and selecting Okular document archive in the Filter selector. Documents saved this way will get .okular as their filename extension. To open an Okular document archive, just open it with Okular as it would be e.g. a PDF document.