Okular has a very flexible bookmark system. Okular saves the position on the page in bookmark and allows you to define more than one bookmark per page.
To manage bookmarks in Okular you can use Bookmarks view from Navigation Panel, Bookmarks menu or context menu of document view (click with mouse button to open it).
To open Bookmarks view click on Bookmarks item on the Navigation Panel. If the Navigation Panel is not shown, use → (F7) main menu item to make it visible.
The filter bar at the top of Bookmarks view can be used to filter the content of bookmark list pane according to the text in the box.
The list pane permits to view the bookmark list in a tree-like fashion: each document in the list can be “expanded” or “collapsed” by clicking on the < or v icon next to it.
Click on icon below the list to show only the bookmarks from the current document.
Right-click menu of document item can be used to open document, rename its item or remove it from the list. Remember that the removal of a document item leads to the removal of all bookmarks in the corresponding document.
Right-click menus of individual bookmark items allow you to go to the bookmark, rename or remove it.