es/help_ex.png"><b>&nbsp;Examples</b></a><br><small></small>
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      &nbsp;<a href="User_guide.html" target="content"><img border="0" src="Images/help_ug.png"><b>&nbsp;User guide</b></a><br><small>
         &nbsp;&nbsp;&nbsp;&nbsp;<a href="User_guide1.html" target="content"><img src="Images/pageicon.gif" border="0">&nbsp;1. Understanding layouts</a><br>
         &nbsp;&nbsp;&nbsp;&nbsp;<a href="User_guide2.html" target="content"><img src="Images/pageicon.gif" border="0">&nbs