emacs-27 487aae3 1/2: Updating docs with all special window prefix keys.

[Eli Zaretskii]

branch: emacs-27
commit 487aae38d4348ff98cfef170f3d08505399d3af0
Author: Jared Finder <jared@finder.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Updating docs with all special window prefix keys.
    
    * doc/lispref/commands.texi (Key Sequence Input): Add documentation for
    missing special window areas.  Explicitly call out window or frame.
    
    (cherry picked from commit a105db13e11fd15cc72804bf33672122d1c3f2e1)
---
 doc/lispref/commands.texi | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/doc/lispref/commands.texi b/doc/lispref/commands.texi
index aabaec2..d70c4d5 100644
--- a/doc/lispref/commands.texi
+++ b/doc/lispref/commands.texi
@@ -2517,8 +2517,14 @@ with any other events.
 @cindex @code{vertical-scroll-bar} prefix key
 @cindex @code{menu-bar} prefix key
 @cindex @code{tab-bar} prefix key
-@cindex mouse events, in special parts of frame
-When mouse events occur in special parts of a window, such as a mode
+@cindex @code{left-margin} prefix key
+@cindex @code{right-margin} prefix key
+@cindex @code{left-fringe} prefix key
+@cindex @code{right-fringe} prefix key
+@cindex @code{right-divider} prefix key
+@cindex @code{bottom-divider} prefix key
+@cindex mouse events, in special parts of window or frame
+When mouse events occur in special parts of a window or frame, such as a mode
 line or a scroll bar, the event type shows nothing special---it is the
 same symbol that would normally represent that combination of mouse
 button and modifier keys.  The information about the window part is kept
@@ -2526,9 +2532,11 @@ elsewhere in the event---in the coordinates.  But
 @code{read-key-sequence} translates this information into imaginary
 prefix keys, all of which are symbols: @code{tab-line}, @code{header-line},
 @code{horizontal-scroll-bar}, @code{menu-bar}, @code{tab-bar}, 
@code{mode-line},
-@code{vertical-line}, and @code{vertical-scroll-bar}.  You can define
-meanings for mouse clicks in special window parts by defining key
-sequences using these imaginary prefix keys.
+@code{vertical-line}, @code{vertical-scroll-bar}, @code{left-margin},
+@code{right-margin}, @code{left-fringe}, @code{right-fringe},
+@code{right-divider}, and @code{bottom-divider}.  You can define meanings for
+mouse clicks in special window parts by defining key sequences using these
+imaginary prefix keys.
 
 For example, if you call @code{read-key-sequence} and then click the
 mouse on the window's mode line, you get two events, like this: