The Start button takes you to Start Screen and lets you toggle between open apps Alt-Tab cycles through apps in sequence, as usual Arrow keys allow you to move through the Start screen Windows + C brings up the Charm menu, as does hovering over the lower-left hand corner of the screen Windows + F brings up the Search screen, though simply typing (when on the Start screen) is more convenient Windows + Z in a fullscreen app brings up the contextual menus Windows + D takes you to the desktop Windows + L locks the PC, invoking the lock screen Windows + P pulls up multi-monitor settings Windows + I brings up the Settings charm Windows + E invokes Windows Explorer, as ever Windows + R brings up the Run prompt Windows + Y makes all your open windows (and the Metro UI) transparent, so you can see the desktop beneath Windows + X shows Windows Mobility Center, which appears to serve much the same role as the Settings charm but on the desktop instead The Scroll wheel pans across Start screen, slowly Right-click brings up contextual menus in a full screen app Left-click on the Start screen brings up options to unpin, resize and uninstall apps Ctrl-Alt-Delete summons a screen with options to shut down, switch users, log off or quickly open the Task Manager