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      <title>Boundary geometry</title>
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      <div class="title_topic2" id="xps10_pagetitle">Boundary geometry</div>
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               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('mfgturning/turn_geom_select_geom.html');return(false);">Selecting/Editing Geometry</a></p>
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               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('mfgturning/turn_geom_select_part.html');return(false);">Selecting/Editing the Part</a></p>
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               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('mfgturning/turn_geom_blank.html');return(false);">Selecting/Editing the Blank</a></p>
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               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('mfgturning/06topic_27.html');return(false);">Containment</a></p>
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      </table><br><p class="para_topic">The lines that delineate each of a part's individual geometries are called boundaries. You can select and view boundaries in the Geometry View. Once boundaries have been selected, their parameters are inherited to the cutting operation, eliminating extra boundary selection within the operation menu. </p>
      <p class="para_topic">In your initial Turning session, you should define all the boundaries you need. At the least, you should define the part boundary and the blank boundary. (The system remembers the state of the blank, and uses this as input for the next operation.) </p>
      <p class="para_topic">When you are selecting the boundaries on one side of the centerline, the Turning system automatically mirrors this shape across centerline to represent the full part. When using tube stock, it is important to close the boundary as this selection does not touch the center line.</p>
      <p class="para_topic">The Turning module supports feature selection below the centerline and keeps track of the location of features relative to the centerline. &nbsp;Operations applied to features selected below centerline will be displayed in their proper orientation. The next figure shows an example of a feature selected below centerline:</p>
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      <div class="title_figure">Feature Selected Below Centerline</div>
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                  <p class="para_note_body">  For an in-depth discussion of boundaries, please refer to the <cite class="titleReference">Manufacturing General Help</cite>. The subsequent sections will explain only those items particular to Turning.
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            <p class="para_item">&nbsp;To ease selection of part and boundary curves, ensure that they are on separate layers.</p>
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