Click on this icon to display the system menu. Almost the same as any other Windows Application, but with the addition of the Top Pane toggle. This toggle will hide the Quick Access Toolbar and the Ribbon. This offers more display area for embedded sessions. If you hide the Top Pane using this toggle, or with the View - Layout - Top Pane command, this is one of the way to restore it. The other being the keyboard shortcut assigned to this command, namely Alt-F11.
If you get lost with the View and would like to reset it to its original layout, go in the menu Window - Reset Layout.
Window - Reset Layout