I created a mockup for Okular some time ago.
The main intention was to create a better user experience.
What changed ?
- Darkened the background behind the actual document to have better contrast and make the document stand out more.
- Move the search field to the right toolbar where most other applications have them.
- Move the zoom fields to the status bar and add a zoom slider like we use to have it in Dolphin.
- Aligned the status modes in the middle of the toolbar to separate them from other actions (now where we have the sexy spacer)
- Added actions for "first page" and "last page" by default just to make use of the free space.
- Get rid of the "view switcher"
- The thumbnail view replaces the default scrollbar, as we have it in KTextEditor component
- The three other views are separated into independent components and can be closed or rearranged on both sides of the main window, like we have them in Dolphin too