The dock windows
Simulator Aircraft and
Search have tab bars that allow to close,
open and move tabs.
Tooltips give more information about the function of a tab.
Note that you cannot move a tab to another window.
Window -> Reset Tabs to Default menu item in the
main menu also resets the tab visibility and order to default.
8.2. Mouse actions
Click and drag a tab to move it.
Double click a tab to close it.
Right click a tab to open the context menu.
Use the mouse wheel above a tab bar to cycle between tabs.
8.3. Stacked Dock Window Tabs
Tabs at the bottom of a window appear when you drop dock windows on each other. Grab a window title bar to move a window out of the stacked display. You can also change the order of these tabs by dragging them around.
See Dock Windows for more information about stacked dock windows.