devdocs/elisp/buffers.html


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 <h2 class="chapter">Buffers</h2>  <p>A <em>buffer</em> is a Lisp object containing text to be edited. Buffers are used to hold the contents of files that are being visited; there may also be buffers that are not visiting files. While several buffers may exist at one time, only one buffer is designated the <em>current buffer</em> at any time. Most editing commands act on the contents of the current buffer. Each buffer, including the current buffer, may or may not be displayed in any windows. </p> <table class="menu" border="0" cellspacing="0"> <tr>
<td align="left" valign="top">• <a href="buffer-basics" accesskey="1">Buffer Basics</a>
</td>
<td> </td>
<td align="left" valign="top">What is a buffer? </td>
</tr> <tr>
<td align="left" valign="top">• <a href="current-buffer" accesskey="2">Current Buffer</a>
</td>
<td> </td>
<td align="left" valign="top">Designating a buffer as current so that primitives will access its contents. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="buffer-names" accesskey="3">Buffer Names</a>
</td>
<td> </td>
<td align="left" valign="top">Accessing and changing buffer names. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="buffer-file-name" accesskey="4">Buffer File Name</a>
</td>
<td> </td>
<td align="left" valign="top">The buffer file name indicates which file is visited. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="buffer-modification" accesskey="5">Buffer Modification</a>
</td>
<td> </td>
<td align="left" valign="top">A buffer is <em>modified</em> if it needs to be saved. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="modification-time" accesskey="6">Modification Time</a>
</td>
<td> </td>
<td align="left" valign="top">Determining whether the visited file was changed behind Emacs’s back. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="read-only-buffers" accesskey="7">Read Only Buffers</a>
</td>
<td> </td>
<td align="left" valign="top">Modifying text is not allowed in a read-only buffer. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="buffer-list" accesskey="8">Buffer List</a>
</td>
<td> </td>
<td align="left" valign="top">How to look at all the existing buffers. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="creating-buffers" accesskey="9">Creating Buffers</a>
</td>
<td> </td>
<td align="left" valign="top">Functions that create buffers. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="killing-buffers">Killing Buffers</a>
</td>
<td> </td>
<td align="left" valign="top">Buffers exist until explicitly killed. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="indirect-buffers">Indirect Buffers</a>
</td>
<td> </td>
<td align="left" valign="top">An indirect buffer shares text with some other buffer. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="swapping-text">Swapping Text</a>
</td>
<td> </td>
<td align="left" valign="top">Swapping text between two buffers. </td>
</tr> <tr>
<td align="left" valign="top">• <a href="buffer-gap">Buffer Gap</a>
</td>
<td> </td>
<td align="left" valign="top">The gap in the buffer. </td>
</tr> </table><div class="_attribution">
  <p class="_attribution-p">
    Copyright &copy; 1990-1996, 1998-2022 Free Software Foundation, Inc. <br>Licensed under the GNU GPL license.<br>
    <a href="https://www.gnu.org/software/emacs/manual/html_node/elisp/Buffers.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Buffers.html</a>
  </p>
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