You can widen the navigator pane, by dragging right the vertical splitter between navigator and content tabs.
Widening the navigator pane, you see more columns in the navigator's results zone in a list view, or more thumbnails in a grid view, but the content tab zone (in other words, where the articles, pages, editions, etc are displayed), becomes narrower.
Of course, you can narrow the navigator pane, by dragging the splitter left.
When widening the navigator pane, you cannot exceed the hard-coded limit, set in the configuration. See Change default navigator width for details.
Store changed width
To store the changed width in Ted4 and Fred4, save the workspace.
Note
When you widen the navigator, the search criteria zone is not recomposed - so you can't get more fields in the horizontal sense.