<div dir="ltr"><div><div><div><div><div><div>Don Arseneau brought up a good point <br>about considering not only line width, <br>but also paragraph length.<br><br></div>I am interested to know when the paragraph marker<br>
changed from an indent to an extra line<br></div>which encloses a paragraph in white space.<br><br></div>Robert Horn did a lot of research on the presentation of information.<br>In his work he dispenses with the idea of the paragraph<br>
and replaces it with the concept of a topic,<br>which has a topic descriptor in the left margin and the explanation<br>in one or more blocks.<br><br>Here are his two books.<br><br>Mapping hypertext: the analysis, organization, <br>
and display of knowledge <br>for the next generation of on-line text and graphics. 1989<br><br>Visual language : global communication for the 21st century. 1998<br><br><a href="http://en.wikipedia.org/wiki/Robert_E._Horn">http://en.wikipedia.org/wiki/Robert_E._Horn</a><br>
<br></div><div>His research is the foundation of the Information Mapping,<br>also known as Structured Writing.<br></div><div><br></div>After studying his work, I chose the Reference Manual document class<br></div>when I began my technical writing career in earnest.<br>
<br></div>See also the national standards ideas in<br>The Plain Writing Act of 2010<br><br><a href="http://en.wikipedia.org/wiki/Plain_Writing_Act_of_2010">http://en.wikipedia.org/wiki/Plain_Writing_Act_of_2010</a><br><div>
<br>Ron Fehd Atlanta GA<br><div><div><br></div></div></div></div>