Markup improvements.

Author: bmomjian

src/tools/backend/index.html

@@ -14,8 +14,8 @@ <h2>by Bruce Momjian</h2>
 
 <p><img src="flow.gif" usemap="#flowmap" alt="flowchart" />
 
-<em>Click on an item to see more detail or look at the full
-<a href="backend_dirs.html">index.</a></em>
+<center><h3>Click on an item to see more detail or look at the full
+<a href="backend_dirs.html">index.</a></h3></center>
 
 <map name="flowmap" id="flowmap">
 <area coords="125,35,245,65" href="backend_dirs.html#main" alt="main" />