(Transient Mark): Clarify that region never disappears

when Transient Mark mode is off, and not when it is on.

1 files changed, 15 insertions, 13 deletions

diff --git a/man/mark.texi b/man/mark.texi
index cf7b87366e8..7429b67db2b 100644
--- a/man/mark.texi
+++ b/man/mark.texi
@@ -139,21 +139,23 @@ have a text terminal where typing @kbd{C-@key{SPC}} does not produce
   On a terminal that supports colors, Emacs has the ability to
 highlight the current region.  But normally it does not.  Why not?
 
-  Once you have set the mark in a buffer, there is @emph{always} a
-region in that buffer.  This is because every command that sets the
-mark also activates it, and nothing ever deactivates it.  Highlighting
-the region all the time would be a nuisance.  So normally Emacs
-highlights the region only immediately after you have selected one
-with the mouse.
+  In the normal mode of use, every command that sets the mark also
+activates it, and nothing ever deactivates it.  Thus, once you have
+set the mark in a buffer, there is @emph{always} a region in that
+buffer.  Highlighting the region all the time would be a nuisance.  So
+normally Emacs highlights the region only immediately after you have
+selected one with the mouse.
 
   If you want region highlighting, you can use Transient Mark mode.
-This is a more rigid mode of operation in which the region always
-``lasts'' only until you use it; you explicitly must set up a region
-for each command that uses one.  In Transient Mark mode, most of the
-time there is no region; therefore, highlighting the region when it
-exists is useful and not annoying.  When Transient Mark mode is
-enabled, Emacs always highlights the region whenever there is a
-region.
+This is a more rigid mode of operation in which the region ``lasts''
+only until you use it; operating on the region text deactivates the
+mark, so there is no region any more.  Therefore, you must explicitly
+set up a region for each command that uses one.
+
+  When Transient Mark mode is enabled, Emacs highlights the region,
+whenever there is a region.  In Transient Mark mode, most of the time
+there is no region; therefore, highlighting the region when it exists
+is useful and not annoying.
 
 @findex transient-mark-mode
   To enable Transient Mark mode, type @kbd{M-x transient-mark-mode}.