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(Setting Mark): Clarify info about displaying mark.

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Clarify explanation of C-@ and C-SPC.
(Transient Mark): Mention Delete Selection mode.
(Marking Objects): Clean up text about extending the region.
This commit is contained in:
Richard M. Stallman 2005-02-25 13:51:59 +00:00
parent 41f1d48998
commit 87c190c749
1 changed files with 44 additions and 36 deletions
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80
man/mark.texi
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@ -85,23 +85,28 @@ can move point away, leaving the mark behind.
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 (like @kbd{Mouse-1}). Both of
these methods copy 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 the kill ring, you must
use keyboard commands to set the mark. @xref{Mouse Commands}.
@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
ring in addition to setting the mark; that gives behavior consistent
with other window-driven applications, but if you don't want to modify
the kill ring, you must use keyboard commands to set the mark.
@xref{Mouse Commands}.
@kindex C-x C-x
@findex exchange-point-and-mark
Ordinary terminals have only one cursor, so there is no way for Emacs
to show you where the mark is located. You have to remember. The usual
solution to this problem is to set the mark and then use it soon, before
you forget where it is. Alternatively, you can see where the mark is
with the command @kbd{C-x C-x} (@code{exchange-point-and-mark}) which
puts the mark where point was and point where the mark was. The extent
of the region is unchanged, but the cursor and point are now at the
previous position of the mark. In Transient Mark mode, this command
also reactivates the mark.
When Emacs was developed, terminals had only one cursor, so Emacs
does not show where the mark is located--you have to remember. If you
enable Transient Mark mode (see below), then the region is highlighted
when it is active; you can tell mark is at the other end of the
highlighted region. But this only applies when the mark is active.
The usual solution to this problem is to set the mark and then use
it soon, before you forget where it is. Alternatively, you can see
where the mark is with the command @kbd{C-x C-x}
(@code{exchange-point-and-mark}) which puts the mark where point was
and point where the mark was. The extent of the region is unchanged,
but the cursor and point are now at the previous position of the mark.
In Transient Mark mode, this command also reactivates the mark.
@kbd{C-x C-x} is also useful when you are satisfied with the position
of point but want to move the other end of the region (where the mark
@ -113,14 +118,13 @@ the new position with point back at its original position.
@ref{Mark Ring}.
@kindex C-@@
There is no such character as @kbd{C-@key{SPC}} in @acronym{ASCII}; when you
type @key{SPC} while holding down @key{CTRL}, what you get on most
ordinary terminals is the character @kbd{C-@@}. This key is actually
bound to @code{set-mark-command}. But unless you are unlucky enough to
have a terminal where typing @kbd{C-@key{SPC}} does not produce
There is no such character as @kbd{C-@key{SPC}} in @acronym{ASCII};
when you type @key{SPC} while holding down @key{CTRL} on a text
terminal, what you get is the character @kbd{C-@@}. This key is also
bound to @code{set-mark-command}--so unless you are unlucky enough to
have a text terminal where typing @kbd{C-@key{SPC}} does not produce
@kbd{C-@@}, you might as well think of this character as
@kbd{C-@key{SPC}}. Under X, @kbd{C-@key{SPC}} is actually a distinct
character, but its binding is still @code{set-mark-command}.
@kbd{C-@key{SPC}}.
@node Transient Mark
@section Transient Mark Mode
@ -181,6 +185,10 @@ deactivates the mark. This means any subsequent command that operates
on a region will get an error and refuse to operate. You can make the
region active again by typing @kbd{C-x C-x}.
@item
If Delete Selection mode is also enabled, some commands delete the
region when used while the mark is active. @xref{Graphical Kill}.
@item
Quitting with @kbd{C-g} deactivates the mark.
@ -320,10 +328,10 @@ Put region around current page (@code{mark-page}).
word, while @kbd{C-M-@@} (@code{mark-sexp}) puts it at the end of the
next balanced expression (@pxref{Expressions}). These commands handle
arguments just like @kbd{M-f} and @kbd{C-M-f}. If you repeat these
commands, the region is extended. For example, you can type either
@kbd{C-u 2 M-@@} or @kbd{M-@@ M-@@} to mark the next two words.
The region is also extended when the mark is active in Transient Mark
mode, regardless of the last command.
commands, that extends the region. For example, you can type either
@kbd{C-u 2 M-@@} or @kbd{M-@@ M-@@} to mark the next two words. This
command also extends the region when the mark is active in Transient
Mark mode, regardless of the last command.
@kindex C-x h
@findex mark-whole-buffer
@ -337,20 +345,20 @@ paragraph. With prefix argument, if the argument's value is positive,
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. The @kbd{M-h} command
also supports the extension of the region, similar to @kbd{M-@@} and
@kbd{C-M-@@}.
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-@@}.
@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}). (Currently it only marks one defun,
but repeating it marks more defuns, like for @kbd{M-@@}.) @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 terminating page
delimiter (to include it in the region), while point goes after the
preceding page delimiter (to exclude it). A numeric argument
specifies a later page (if positive) or an earlier page (if negative)
instead of the current page.
defun (@pxref{Moving by Defuns}). Repeating @kbd{C-M-h} also extends
the region.
@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
terminating page delimiter (to include it in the region), while point
goes after the preceding page delimiter (to exclude it). A numeric
argument specifies a later page (if positive) or an earlier page (if
negative) instead of the current page.
Finally, @kbd{C-x h} (@code{mark-whole-buffer}) sets up the entire
buffer as the region, by putting point at the beginning and the mark at