The tab set on the vertically docked window beneath command bar changes depending on the environment in which you are currently working.
Layers tab
Library tab
Groups tab
Queries tab
Assembly PathFinder tab
Parts Library tab
Alternate Assemblies tab
Sensors tab
Select Tools tab
Explode PathFinder tab
Using the Simulation pane
Feature Library tab
Family of Parts tab
Feature Playback tab
Reposition a window using docking stickers
Reopen a closed docking window
Managing docking windows
Manipulate docking windows