Kill current window.
If there is an
exec command running then it is killed.
Otherwise the process (shell) running in the window receives a HANGUP
condition, the window structure is removed and
screen (your display)
switches to another window. When the last window is destroyed,
exits. After a
screen switches to the previously displayed
emacs users should keep this command in mind, when killing a
line. It is recommended not to use
C-a as the screen escape key or to