Re: question about org-region-active-p

[Robert Goldman <rpgoldman@sift.info>]

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Carsten Dominik wrote:
> Ah, so maybe Robert did not turn it off....
> 
> Anyway, in Emacs 23 the default will be ON.  It was always my understanding
> that in order to use regions efficiently, you needed to turn on that mode.
> 
> Anyway, Robert, could you please try to identify a location in the docs
> where I should put this information?  Ask yourself:  "Where would I have
> seen this, had i been there....".

Attached please find a patch file that gives a proposed set of additions
to the manual on this topic, for your review.  Interestingly enough,
there was already an index entry for transient mark mode at the html
export commands page.

Best,
Robert

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diff --git a/doc/org.texi b/doc/org.texi
index 39c94aa..f8a5ea2 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -7061,6 +7061,7 @@ is normal.
 @node Exporting, Publishing, Embedded LaTeX, Top
 @chapter Exporting
 @cindex exporting
+@cindex Transient mark mode
 
 Org mode documents can be exported into a variety of other formats.  For
 printing and sharing of notes, ASCII export produces a readable and
@@ -7073,6 +7074,10 @@ deadlines or appointments into a desktop calendar program like iCal,
 Org mode can also produce extracts in the iCalendar format.  Currently
 Org mode only supports export, not import of these different formats.
 
+Org supports export of selected regions when @code{transient mark mode} is
+enabled.  This should always be enabled in default emacs configurations.
+
+
 @menu
 * Markup rules::                Which structures are recognized?
 * Selective export::            Using tags to select and exclude trees
@@ -7605,7 +7610,11 @@ file.
 Export as ASCII file.  For an org file @file{myfile.org}, the ASCII file
 will be @file{myfile.txt}.  The file will be overwritten without
 warning.  If there is an active region, only the region will be
-exported. If the selected region is a single tree@footnote{To select the
+exported.@footnote{Exporting by active region will only work if @code{transient mark
+  mode} is enabled.  This should almost always be enabled.  However, if it is
+not enabled, attempts to export a region will result in exporting the entire
+org file.  If this happens, check the setting of the variable
+@code{transient-mark-mode} in your emacs.} If the selected region is a single tree@footnote{To select the
 current subtree, use @kbd{C-c @@}.}, the tree head will
 become the document title.  If the tree head entry has or inherits an
 @code{EXPORT_FILE_NAME} property, that name will be used for the
@@ -7662,11 +7671,16 @@ language, but with additional support for tables.
 @item C-c C-e h
 Export as HTML file @file{myfile.html}.  For an org file @file{myfile.org},
 the ASCII file will be @file{myfile.html}.  The file will be overwritten
-without warning.  If there is an active region, only the region will be
+without warning.  If there is an active region,@footnote{Exporting by active region will only work if @code{transient mark
+  mode} is enabled.  This should almost always be enabled.  However, if it is
+not enabled, attempts to export a region will result in exporting the entire
+org file.  If this happens, check the setting of the variable
+@code{transient-mark-mode} in your emacs.} only the region will be
 exported. If the selected region is a single tree@footnote{To select the
 current subtree, use @kbd{C-c @@}.}, the tree head will become the document
 title.  If the tree head entry has or inherits an @code{EXPORT_FILE_NAME}
 property, that name will be used for the export.
+
 @kindex C-c C-e b
 @item C-c C-e b
 Export as HTML file and immediately open it with a browser.
@@ -7911,8 +7925,12 @@ references, the PDF output file will be fully linked.
 Export as La@TeX{} file @file{myfile.tex}.  For an org file
 @file{myfile.org}, the ASCII file will be @file{myfile.tex}.  The file will
 be overwritten without warning.  If there is an active region, only the
-region will be exported. If the selected region is a single tree@footnote{To
-select the current subtree, use @kbd{C-c @@}.}, the tree head will become the
+region will be exported.@footnote{Exporting by active region will only work if @code{transient mark
+  mode} is enabled.  This should almost always be enabled.  However, if it is
+not enabled, attempts to export a region will result in exporting the entire
+org file.  If this happens, check the setting of the variable
+@code{transient-mark-mode} in your emacs.} If the selected region is a single tree,@footnote{To
+select the current subtree, use @kbd{C-c @@}.} the tree head will become the
 document title.  If the tree head entry has or inherits an
 @code{EXPORT_FILE_NAME} property, that name will be used for the export.
 @kindex C-c C-e L

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