Working in a file with an HTML extension places Emacs in html major mode. <p><pre>C-c 2</pre> Header 2 tag</p> <p> <pre>C-c / </pre> Closes a tag </p> <p> <pre>C-h m</pre> Displays help / key bindings for major mode. </p> <p><pre>C-c RETURN</pre> for a paragraph tag</p>