@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
@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: