devdocs/elisp/overlay-type.html


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 <h4 class="subsection">Overlay Type</h4> <p>An <em>overlay</em> specifies properties that apply to a part of a buffer. Each overlay applies to a specified range of the buffer, and contains a property list (a list whose elements are alternating property names and values). Overlay properties are used to present parts of the buffer temporarily in a different display style. Overlays have no read syntax, and print in hash notation, giving the buffer name and range of positions. </p> <p>See <a href="overlays">Overlays</a>, for information on how you can create and use overlays. </p><div class="_attribution">
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    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/Overlay-Type.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Overlay-Type.html</a>
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