+2013-08-15 Xue Fuqiao <xfq.free@gmail.com>
+
+ * markers.texi (The Region): Add/move indexes.
+
2013-08-13 Lars Magne Ingebrigtsen <larsi@gnus.org>
* display.texi (ImageMagick Images): Mention :content-type and
@section The Mark
@cindex mark, the
@c @cindex the mark?
-@cindex mark ring
Each buffer has a special marker, which is designated @dfn{the
mark}. When a buffer is newly created, this marker exists but does
Mark mode. (Another is that this enables highlighting of the region
when the mark is active. @xref{Display}.)
+@cindex mark ring
In addition to the mark, each buffer has a @dfn{mark ring} which is a
list of markers containing previous values of the mark. When editing
commands change the mark, they should normally save the old value of the
larger.
@end defun
+@c FIXME: Mention it in tips.texi?
Instead of using @code{region-beginning} and @code{region-end}, a
command designed to operate on a region should normally use
@code{interactive} with the @samp{r} specification to find the
function is intended to be used by commands that operate on the
region, instead of on text near point, when the mark is active.
+@cindex empty region
+@vindex use-empty-active-region
A region is valid if it has a non-zero size, or if the user option
@code{use-empty-active-region} is non-@code{nil} (by default, it is
@code{nil}). The function @code{region-active-p} is similar to