--- a/608toVTT/608toVTT.html	Thu Nov 08 09:56:59 2012 +1100
+++ b/608toVTT/608toVTT.html	Thu Nov 08 10:09:44 2012 +1100
@@ -367,6 +367,8 @@
           Within the Caption Screen, CEA-708 defines "Caption Windows" through which the caption text is rendered. For WebVTT we map CEA-708 "Caption Windows" to <a href="http://www.w3.org/community/texttracks/wiki/MultiCueBox">WebVTT Regions</a>. In CEA-708 there are at most 8 Caption Windows - in WebVTT we can define an unlimited number of regions.
         </p>
 
+        <h3>Caption Window Priority</h3>
+
         <p>
           CEA-708 Caption Windows define a priority between the 8 captions windows with lower priority windows overlaying higher priority windows. Priority values are mapped to the WebVTT "layer" attribute of Regions as follows:
         </p>
@@ -414,6 +416,8 @@
           </tbody>
         </table>
 
+        <h3>Caption Window Anchor Points</h3>
+
         <p>
           CEA-708 Caption Windows are positioned by specifying one of 9 different "Anchor points" covering a 9 field grid of the window. An Anchor Point is anchored to a specific location on the Caption Screen. Anchor points are mapped to the WebVTT "regionanchor" attribute of Regions as follows:
         </p>
@@ -465,8 +469,11 @@
           </tbody>
         </table>
 
+
+        <h3>Caption Window Location</h3>
+
         <p>
-          For WebVTT we assume that the grid that is defined on the Caption Screen consists of 100 horizontal cells and 100 vertical cells.
+          For CEA-708 WebVTT we assume that the grid that is defined on the Caption Screen consists of 100 horizontal cells and 100 vertical cells, i.e. we can position using percentages.
         </p>
 
         <p>
@@ -490,7 +497,7 @@
 
         <p>
           The height of a Caption Window is converted to a WebVTT Region height by multiplying by 5.33, resulting in a percentage Region height setting:<br>
-          h=rows*5.22<br>
+          h=rows*5.33<br>
           height:h%
         </p>
 
@@ -498,6 +505,8 @@
           The actual height and width of the caption window depends, however, on the actual font size. Thus, the width is calculated by multiplying the number of columns with the character width and the height by multiplying the number of rows with the character height.
         </p>
 
+        <h3>Caption Window Row and Column Locking</h3>
+
         <p>
           The "Lock Rows" and “Lock Columns” Caption Window parameters of CEA-708 when set fix the maximum number of rows and columns of caption text that a window may have. This means that lines that were rendered at the default font size are not changed when the user changes the font size. Thus, when the user changes the font size, the window's size scales to become smaller or larger to accommodate the smaller or bigger space required to render the caption text.
         </p>