Terminal Server / Remote Desktop Client Shortcut Keys:

Key combination Function Similar local keys
CTRL+ALT+END Opens the Windows Security dialog box CTRL+ALT+DELETE
CTRL+ALT+BREAK Toggles the Terminal Services client display from window to full screen NONE
ALT+INSERT Cycles through running programs on the remote computer ALT+TAB
ALT+HOME Displays the remote computer's Start menu  
ALT+DELETE Displays the remote window's Control menu ALT+SPACE BAR
CTRL+ALT+NUMBER PAD MINUS Places an image of active window onto the TS clipboard ALT+PRINT SCREEN
CTRL+ALT+NUMBER PAD PLUS Places an image of the entire Terminal Services client on the Terminal Services clipboard PRINT SCREEN

Citrix ICA Client Shortcut Keys:

Key combination Function Similar local keys
SHIFT+F1 The Task List hotkey displays the local Windows Task List for Windows NT 3.51 client computers or the local Start menu for Windows NT 4.0 or Windows 95 client computers. NONE
SHIFT+F2 The Toggle Title Bar hotkey causes the Citrix ICA Client window to display or hide its Windows title bar. NONE
SHIFT+F3 The Close Remote Application hotkey disconnects the ICA session and exits the ICA Win32 Client. Using this hotkey either leaves the associated application in a disconnected state on the Citrix server or exits the application on the Citrix server, depending on how the application is configured. NONE
CTRL+F1 This hotkey displays the Windows NT Security desktop in the ICA session. CTRL+ALT+DEL
CTRL+F2 When using this hotkey during an ICA session on a WinFrame server, the remote Task List appears. For MetaFrame ICA sessions, the remote Windows NT Start menu appears. CTRL+ESC
CTRL+F3 This hotkey displays the Windows NT Task Manager in the ICA session. CTRL+SHIFT+ESC
ALT+F2 Use this hotkey to cycle through maximized and minimized Windows of programs that have been opened in the ICA session. ALT+ESC
ALT+PLUS Use this hotkey to cycle through applications that have been opened in the ICA session. A popup box appears and displays the programs as you
cycle through them.		 ALT+TAB
ALT+MINUS Cycles through applications that have been opened in the ICA session but in the
opposite direction.		 ALT+SHIFT+TAB