How do I simulate Ctrl+Alt+Del?

How do I simulate Ctrl+Alt+Del (or any other key combination)?

If you are in full screen mode and wish to send Ctrl+Alt+Del (or any other key combination) to the virtual machine, hover the mouse over the top center of the screen and click on the right icon: . If you are not in full screen mode, click on Send Key in the menu and select the appropriate key combination.