The Menu Bar appears on the left side of the screen. It consists of Menu items that lead to separate pages configured with Manage > Page.
The pages that appear on this bar can vary, depending on which Open Manage Network Manager package you have installed.
The toggle on the right side of the The Dock makes this menu bar appear or disappear.
You can drag and drop the menu bar labels to different positions, and can click a label to rename the page, or delete it (with the “x”).