@opindex ixon
@kindex C-s/C-q flow control
@cindex XON/XOFF flow control
-Enable XON/XOFF flow control (that is, @key{CTRL-s}/@key{CTRL-Q}). May
+Enable XON/XOFF flow control (that is, @kbd{CTRL-S}/@kbd{CTRL-Q}). May
be negated.
@item ixoff
special character. (This is incompatible with Ultrix @code{stty},
which uses a value of @samp{u} to disable a special character. GNU
@code{stty} treats a value @samp{u} like any other, namely to set that
-special character to @key{u}.)
+special character to @key{U}.)
@table @samp