If you aren’t happy with the small presentation area for articles on the listing.item.html template that shows the display for the main NA module.  Look for this code and change the [DETAILS:150] object to read the number of characters you want to display.  The default is 150.

<td class="articleTextCell">
     <span class="Normal">
                 [HASSUMMARY][SUMMARY][/HASSUMMARY][HASNOSUMMARY][DETAILS:150][/HASNOSUMMARY]
     </span>
</td>