The buttons in the navigation panels have the following meaning:
</p>
<tableborder="1">
<tr>
<th> Button </th>
<th> Name </th>
<th> Go to </th>
<th> From 1.2.3 go to</th>
</tr>
<tr>
<tdalign="center"> [ << ] </td>
<tdalign="center">FastBack</td>
<td>Beginning of this chapter or previous chapter</td>
<td>1</td>
</tr>
<tr>
<tdalign="center"> [ < ] </td>
<tdalign="center">Back</td>
<td>Previous section in reading order</td>
<td>1.2.2</td>
</tr>
<tr>
<tdalign="center"> [ Up ] </td>
<tdalign="center">Up</td>
<td>Up section</td>
<td>1.2</td>
</tr>
<tr>
<tdalign="center"> [ > ] </td>
<tdalign="center">Forward</td>
<td>Next section in reading order</td>
<td>1.2.4</td>
</tr>
<tr>
<tdalign="center"> [ >> ] </td>
<tdalign="center">FastForward</td>
<td>Next chapter</td>
<td>2</td>
</tr>
<tr>
<tdalign="center"> [Top] </td>
<tdalign="center">Top</td>
<td>Cover (top) of document</td>
<td> </td>
</tr>
<tr>
<tdalign="center"> [Contents] </td>
<tdalign="center">Contents</td>
<td>Table of contents</td>
<td> </td>
</tr>
<tr>
<tdalign="center"> [Index] </td>
<tdalign="center">Index</td>
<td>Index</td>
<td> </td>
</tr>
<tr>
<tdalign="center"> [ ? ] </td>
<tdalign="center">About</td>
<td>About (help)</td>
<td> </td>
</tr>
</table>
<p>
where the <strong> Example </strong> assumes that the current position is at <strong> Subsubsection One-Two-Three </strong> of a document of the following structure: