Document new features of Whitespace mode

* doc/emacs/display.texi (Useless Whitespace): Document
'whitespace-toggle-options' and the new 'big-indent' style.
Document 'whitespace-big-indent-regexp'.  Document the Global
Whitespace mode.

2 files changed, 22 insertions, 4 deletions

diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi
index 38e7a90bf4..1b75a15427 100644
--- a/doc/emacs/display.texi
+++ b/doc/emacs/display.texi
@@ -1164,12 +1164,15 @@ indicate-empty-lines t)}.
 @cindex mode, Whitespace
 @findex whitespace-mode
 @vindex whitespace-style
+@findex whitespace-toggle-options
   Whitespace mode is a buffer-local minor mode that lets you
 visualize many kinds of whitespace in the buffer, by either
 drawing the whitespace characters with a special face or displaying
 them as special glyphs.  To toggle this mode, type @kbd{M-x
 whitespace-mode}.  The kinds of whitespace visualized are determined
-by the list variable @code{whitespace-style}.  Here is a partial list
+by the list variable @code{whitespace-style}.  Individual elements in
+that list can be toggled on or off in the current buffer by typing
+@w{@kbd{M-x whitespace-toggle-options}}.  Here is a partial list
 of possible elements (see the variable's documentation for the full
 list):
 
@@ -1200,6 +1203,13 @@ Highlight newlines.
 @item empty
 Highlight empty lines.
 
+@item big-indent
+@vindex whitespace-big-indent-regexp
+Highlight too-deep indentation.  By default any sequence of at least 4
+consecutive TAB characters or 32 consecutive SPC characters is
+highlighted.  To change that, customize the regular expression
+@code{whitespace-big-indent-regexp}.
+
 @item space-mark
 Draw space and non-breaking characters with a special glyph.
 
@@ -1210,6 +1220,12 @@ Draw tab characters with a special glyph.
 Draw newline characters with a special glyph.
 @end table
 
+@findex global-whitespace-toggle-options
+@findex global-whitespace-mode
+Global Whitespace mode is a global minor mode that lets you visualize
+whitespace in all buffers.  To toggle individual features, use
+@kbd{M-x global-whitespace-toggle-options}.
+
 @node Selective Display
 @section Selective Display
 @cindex selective display
diff --git a/etc/NEWS b/etc/NEWS
index c20afaf7d3..1880e6df4d 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -919,9 +919,11 @@ use PDF instead of DVI.
 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
 many other math macros are displayed using unicode characters.
 
-** whitespace-mode: new 'big-indent style highlighting too much indentation.
-By default, 32 spaces and four TABs are considered to be too much but
-`whitespace-big-indent-regexp' can be configured to change that.
++++
+** New `big-indent' style in `whitespace-mode' highlights deep indentation.
+By default, 32 consecutive spaces or four consecutive TABs are
+considered to be too deep, but the new variable
+`whitespace-big-indent-regexp' can be customized to change that.
 
 ** tildify: `tildify-space-string', `tildify-pattern', and
 `tildify-foreach-region-function' variables added making