@cindex C-
@cindex META
@cindex M-
+@cindex Alt key, serving as Meta
Emacs also recognizes control characters that are entered using
@dfn{modifier keys}. Two commonly-used modifier keys are
@key{Control} (usually labeled @key{Ctrl}), and @key{Meta} (usually
the next character. This feature is useful on certain text terminals
where the @key{Meta} key does not function reliably.
+ Emacs supports 3 additional modifier keys, see @ref{Modifier Keys}.
+
@cindex keys stolen by window manager
@cindex window manager, keys stolen by
On graphical displays, the window manager might block some keyboard
customize Emacs. For instance, you could make @kbd{M-a} and @kbd{M-A}
run different commands.
+@cindex Alt, modifier key
+@cindex Super, modifier key
+@cindex Hyper, modifier key
+@cindex s-
+@cindex H-
+@cindex A-
Although only the @key{Control} and @key{Meta} modifier keys are
commonly used, Emacs supports three other modifier keys. These are
called @key{Super}, @key{Hyper}, and @key{Alt}. Few terminals provide