Commit 7125ef59 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

Minor clarifications.

(Selective Undo): Node deleted.
parent 9f528ded
......@@ -44,7 +44,6 @@ mark in the @dfn{mark ring}.
when there is one.
* Momentary Mark:: Enabling Transient Mark mode momentarily.
* Using Region:: Summary of ways to operate on contents of the region.
* Selective Undo:: Undoing within a given region.
* Marking Objects:: Commands to put region around textual units.
* Mark Ring:: Previous mark positions saved so you can go back there.
* Global Mark Ring:: Previous mark positions in various buffers.
......@@ -88,9 +87,11 @@ button one across a range of text; that puts point where you release the
mouse button, and sets the mark at the other end of that range. Or you
can click mouse button three, which sets the mark at point (like
@kbd{C-@key{SPC}}) and then moves point where you clicked (like
@kbd{Mouse-1}). Both of these methods copy the region into the kill
@kbd{Mouse-1}).
Using the mouse to mark a region copies the region into the kill
ring in addition to setting the mark; that gives behavior consistent
with other window-driven applications, but if you don't want to modify
with other window-driven applications. If you don't want to modify
the kill ring, you must use keyboard commands to set the mark.
@xref{Mouse Commands}.
......@@ -299,30 +300,12 @@ Print hardcopy with @kbd{M-x print-region} (@pxref{Printing}).
@item
Evaluate it as Lisp code with @kbd{M-x eval-region} (@pxref{Lisp Eval}).
@item
Undo changes within it using @kbd{C-u C-x u} (@pxref{Selective Undo}).
Undo changes within it using @kbd{C-u C-x u} (@pxref{Undo}).
@end itemize
Most commands that operate on the text in the region have the word
@code{region} in their names.
@node Selective Undo
@section Selective Undo
@cindex selective undo
@kindex C-u C-x u
Ordinary undo applies to all changes made in the current buffer. You
can also perform @dfn{selective undo}, limited to the current region
(@pxref{Mark}).
To do this, specify the region you want, then run the @code{undo}
command with a prefix argument (the value does not matter): @kbd{C-u
C-x u} or @kbd{C-u C-_}. This undoes the most recent change in the
region. To undo further changes in the same region, repeat the
@code{undo} command (no prefix argument is needed). In Transient Mark
mode (@pxref{Transient Mark}), any use of @code{undo} when there is an
active region performs selective undo; you do not need a prefix
argument.
@node Marking Objects
@section Commands to Mark Textual Objects
......@@ -368,12 +351,12 @@ point. If the prefix argument is @minus{}@var{n}, @kbd{M-h} also
marks @var{n} paragraphs, running back form the one surrounding point.
In that last case, point moves forward to the end of that paragraph,
and the mark goes at the start of the region. Repeating the @kbd{M-h}
command extends the region, just as with @kbd{M-@@} and @kbd{C-M-@@}.
command extends the region to subsequent paragraphs.
@kbd{C-M-h} (@code{mark-defun}) similarly puts point before, and the
mark after, the current (or following) major top-level definition, or
defun (@pxref{Moving by Defuns}). Repeating @kbd{C-M-h} also extends
the region.
defun (@pxref{Moving by Defuns}). Repeating @kbd{C-M-h} extends
the region to subsequent defuns.
@kbd{C-x C-p} (@code{mark-page}) puts point before the current page,
and mark at the end (@pxref{Pages}). The mark goes after the
......
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