(Frames): Mention multiple tty frames.

(Frame Parameters, Parameter Access): Mention frame-local variable bindings.

doc/lispref/frames.texi

@@ -21,8 +21,12 @@ object that represents a frame on the screen.
 
 @cindex terminal frame
   When Emacs runs on a text-only terminal, it starts with one
-@dfn{terminal frame}.  If you create additional ones, Emacs displays
-one and only one at any given time---on the terminal screen, of course.
+@dfn{terminal frame}.  If you create additional frames on the same
+terminal, Emacs displays one and only one at any given time---on that
+terminal screen, of course.  You can create additional frames, either
+text-only or GUI, on other terminals from the same Emacs session.
+(This comes in handy when you connect to the same session from several
+remote locations.)  @c FIXME: Add an xref to multi-tty doc.
 
 @cindex window frame
   When Emacs communicates directly with a supported window system, such
@@ -212,6 +216,9 @@ parameters do something special.  If the terminal supports colors, the
 parameters @code{foreground-color}, @code{background-color},
 @code{background-mode} and @code{display-type} are also meaningful.
 
+  You can use frame parameters to define frame-local bindings for
+variables.  @xref{Frame-Local Variables}.
+
 @menu
 * Parameter Access::       How to change a frame's parameters.
 * Initial Parameters::	   Specifying frame parameters when you make a frame.
@@ -246,6 +253,9 @@ elements of @var{alist}.  Each element of @var{alist} has the form
 parameter.  If you don't mention a parameter in @var{alist}, its value
 doesn't change.  If @var{frame} is @code{nil}, it defaults to the selected
 frame.
+
+You can use this function to define frame-local bindings for
+variables, see @ref{Frame-Local Variables}.
 @end defun
 
 @defun modify-all-frames-parameters alist