To select the buffer named bufname, type C-x b
bufname <RET>. This runs the command
switch-to-buffer with argument bufname. While entering
the buffer name, you can use the usual minibuffer completion and
history commands (see Minibuffer). An empty argument to C-x
b specifies the buffer that was current most recently among those not
now displayed in any window.
If you specify a buffer that does not exist, C-x b creates a
new, empty buffer that is not visiting any file, and selects it for
editing. First, however, Emacs might prompt you for confirmation, in
case you entered the wrong buffer name. Emacs asks for confirmation
only if the last key you typed, before submitting the minibuffer input
with <RET>, was <TAB> (
catches a common mistake, in which one types <RET> before
realizing that <TAB> did not complete far enough to yield the
desired buffer name (see Completion). Emacs asks for confirmation
by putting the message ‘[Confirm]’ in the minibuffer; type
<RET> again to confirm and visit the buffer.
whether Emacs asks for confirmation before visiting a buffer that did
not previously exist. The default value,
gives the behavior we have just described. If the value is
nil, Emacs never asks for confirmation; for any other
nil value, Emacs always asks for confirmation. This
variable also affects the
find-file command (see Visiting).
One reason to create a new buffer is to use it for making temporary
notes. If you try to save it, Emacs asks for the file name to use.
The default value of the variable
major-mode determines the new
buffer's major mode; the default value is Fundamental mode. See Major Modes.
For conveniently switching between a few buffers, use the commands
C-x <LEFT> and C-x <RIGHT>. C-x <RIGHT>
previous-buffer) selects the previous buffer (following the order
of most recent selection in the current frame), while C-x <LEFT>
next-buffer) moves through buffers in the reverse direction.
To select a buffer in a window other than the current one, type
C-x 4 b (
switch-to-buffer-other-window). This prompts
for a buffer name using the minibuffer, displays that buffer in
another window, and selects that window. By default, if displaying
the buffer causes two vertically adjacent windows to be displayed, the
heights of those windows are evened out; to countermand that and
preserve the window configuration, set the variable
Similarly, C-x 5 b (
prompts for a buffer name, displays that buffer in another frame, and
selects that frame.
In addition, C-x C-f, and any other command for visiting a file, can also be used to switch to an existing file-visiting buffer. See Visiting.
You can control how certain buffers are handled by these commands by
customizing the variables
same-window-regexps. See Force Same Window, and
Special Buffer Frames, for more about these variables. In
addition, if the value of
nil, and the buffer you want to switch to is already
displayed in some frame, Emacs will just raise that frame.
C-u M-g M-g, that is
goto-line with a plain prefix
argument, reads a number n using the minibuffer, selects the
most recently selected buffer other than the current buffer in another
window, and then moves point to the beginning of line number n
in that buffer. This is mainly useful in a buffer that refers to line
numbers in another buffer: if point is on or just after a number,
goto-line uses that number as the default for n. Note
that prefix arguments other than just C-u behave differently.
C-u 4 M-g M-g goes to line 4 in the current buffer,
without reading a number from the minibuffer. (Remember that M-g
M-g without prefix argument reads a number n and then moves to
line number n in the current buffer. See Moving Point.)
Emacs uses buffer names that start with a space for internal purposes. It treats these buffers specially in minor ways—for example, by default they do not record undo information. It is best to avoid using such buffer names yourself.blog comments powered by Disqus