Refer to fill column indicator Info node in some places.

* src/xdisp.c (syms_of_xdisp): Add reference to manual in
documentation strings for variables related to fill column indicators.

* lisp/display-fill-column-indicator.el (display-fill-column-indicator)
(display-fill-column-indicator-mode): Add reference to manual.

2 files changed, 10 insertions, 5 deletions

diff --git a/lisp/display-fill-column-indicator.el b/lisp/display-fill-column-indicator.el
index 1b92fa69d29..3f947bdc1c9 100644
--- a/lisp/display-fill-column-indicator.el
+++ b/lisp/display-fill-column-indicator.el
@@ -39,7 +39,8 @@
 (defgroup display-fill-column-indicator nil
   "Display a fill column indicator in the buffer."
   :group 'convenience
-  :group 'display)
+  :group 'display
+  :link '(info-link "(emacs)Displaying Boundaries"))
 
 
 ;;;###autoload
@@ -49,7 +50,8 @@ This uses `display-fill-column-indicator' internally.
 
 To change the position of the column displayed by default
 customize `display-fill-column-indicator-column'.  You can change the
-character for the indicator setting `display-fill-column-indicator-character'."
+character for the indicator setting `display-fill-column-indicator-character'.
+See Info node `Displaying Boundaries' for details."
   :lighter nil
   (if display-fill-column-indicator-mode
       (progn
diff --git a/src/xdisp.c b/src/xdisp.c
index c15dd4770ae..b0fbc9936fb 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -34976,7 +34976,8 @@ It has no effect when set to 0, or when line numbers are not absolute.  */);
   Fmake_variable_buffer_local (Qdisplay_line_numbers_offset);
 
   DEFVAR_BOOL ("display-fill-column-indicator", Vdisplay_fill_column_indicator,
-    doc: /* Non-nil means display the fill column indicator.  */);
+    doc: /* Non-nil means display the fill column indicator.
+See Info node `Displaying Boundaries' for details.  */);
   Vdisplay_fill_column_indicator = false;
   DEFSYM (Qdisplay_fill_column_indicator, "display-fill-column-indicator");
   Fmake_variable_buffer_local (Qdisplay_fill_column_indicator);
@@ -34985,7 +34986,8 @@ It has no effect when set to 0, or when line numbers are not absolute.  */);
     doc: /* Column for indicator when `display-fill-column-indicator' is non-nil.
 The default value is t which means that the indicator
 will use the `fill-column' variable.  If it is set to an integer the
-indicator will be drawn in that column.  */);
+indicator will be drawn in that column.
+See Info node `Displaying Boundaries' for details.  */);
   Vdisplay_fill_column_indicator_column = Qt;
   DEFSYM (Qdisplay_fill_column_indicator_column, "display-fill-column-indicator-column");
   Fmake_variable_buffer_local (Qdisplay_fill_column_indicator_column);
@@ -34993,7 +34995,8 @@ indicator will be drawn in that column.  */);
   DEFVAR_LISP ("display-fill-column-indicator-character", Vdisplay_fill_column_indicator_character,
     doc: /* Character to draw the indicator when `display-fill-column-indicator' is non-nil.
 The default is U+2502 but a good alternative is (ascii 124)
-if the font in fill-column-indicator face does not support Unicode characters.  */);
+if the font in fill-column-indicator face does not support Unicode characters.
+See Info node `Displaying Boundaries' for details.  */);
   Vdisplay_fill_column_indicator_character = Qnil;
   DEFSYM (Qdisplay_fill_column_indicator_character, "display-fill-column-indicator-character");
   Fmake_variable_buffer_local (Qdisplay_fill_column_indicator_character);