You can control whether or not docked panels are displayed or hidden.
To collapse a docked panel, use one of the following methods:
The panel collapses against its adjacent docking area, and a tab is displayed.
To pin a sliding panel:
The panel slides out, and is visible for as long as the cursor is over the tab or its associated panel.
The panel is docked. If your chosen tab belongs to a group of tabs, the other tabs within the group are also pinned and displayed within the panel as separate tabs. The page associated with your chosen tab is shown in the panel, and its name is displayed on its header.