Here's the full list of RDP/MSTSC shortcut hot keys for future reference
ALT+PAGE UP
Switches between programs from left to right.
ALT+PAGE DOWN
Switches between programs for right to left.
ALT+INSERT
Cycles through the programs in the order they were started.
ALT+HOME
Displays the Start menu.
CTRL+ALT+BREAK
Switches the client between full-screen mode and window mode.
CTRL+ALT+END
Brings up the Windows Security dialog box.
ALT+DELETE
Displays the Windows menu.
CTRL+ALT+MINUS SIGN (-)
Places a snapshot of the active window, within the client, on the Remote Desktop Session Host (RD Session Host) server clipboard (provides the same functionality as pressing ALT+PRINT SCREEN on the local computer).
CTRL+ALT+PLUS SIGN (+)
Places a snapshot of the entire client windows area on the RD Session Host server clipboard (provides the same functionality as pressing PRINT SCREEN on the local computer).