Mission Control
Formerly known as Spaces, Mission Control allows a user to do the following:
⌃ ctrl
+↑ up
view all open application windows.⌃ ctrl
+↓ down
view all open application windows of a specific application.⌘ cmd
+F3 Mission Control
hide all application windows and show the desktop.⌃ ctrl
+← left
/→ right
manage application windows across multiple virtual desktops.- manage application windows across multiple monitors.