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      <title>Keep-out area attributes</title>
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      <div class="title_topic3" id="xps10_pagetitle">Keep-out area attributes</div>
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      <p class="para_topic">You can use keep-out area attributes to designate a part of a board as a keep-out area and to set its attributes. A keep-out area defines a region on top or bottom surface of the PCB in which certain characteristics are forbidden. An example would be defining an area in which routing vias may  not be placed. The IDF3 attributes for keep-out areas are <b class="uiTerm">Type</b>, <b class="uiTerm">Height</b>, <b class="uiTerm">Owner</b>, and <b class="uiTerm">Layers</b>.
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      <p class="para_topic">You can apply the keep-out area attributes to a sketch on either the top or bottom surface of the board. This sketch defines the size and shape of the keep-out area. You can define the sketch using the Modeling application. You can later modify the keep-out area's shape by modifying the sketch's shape. To delete the keep-out area, simply delete the sketch.</p>
      <p class="para_topic">See also <a class="links" href="javascript:void(0)" onclick="top.openFile('pcb/02topic_3.html');return(false);">Defining a PCB Assembly </a> for more information.
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      <div class="title_division">Working with keep-out area attributes</div>
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         <li>
            <p class="para_item">Click the<b class="uiTerm"> Keep-out Area Attributes</b> button on the PCB.xchange toolbar. 
            </p>
         </li>
         <li>
            <p class="para_item">Select one or more previously defined sketches on either the top or bottom surface of the board (not both). The sketches must be closed curves. </p>
         </li>
         <li>
            <p class="para_item">Select a keep-out area type. </p>
         </li>
         <li>
            <p class="para_item">If you selected  <b class="uiTerm">Placement Group</b> or  <b class="uiTerm">Other</b>, enter a meaningful name. 
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         </li>
         <li>
            <p class="para_item">Select an <b class="uiTerm">Owner</b> option.
            </p>
         </li>
         <li>
            <p class="para_item">Select a  <b class="uiTerm">Color</b> for the keep-out area display. 
            </p>
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      <div class="title_division">Options</div>
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         <li>
            <p class="para_item">The  <b class="uiTerm">Routing</b> keep-out area prohibits routing from the specified area. The Routing keep-out can be applied to any layer or all layers of the board. The Routing keep-out area is always inside the board outline.
            </p>
         </li>
         <li>
            <p class="para_item">The <b class="uiTerm">Placement</b> keep-out area defines an area of the board where components cannot be placed. You can set a height limitation to prohibit from the area only components that, when mounted, exceed this height. Specify units (millimeters or inches) for the height limitation. Placement keep-outs can be applied to the top, bottom or both surfaces of the board. 
            </p>
         </li>
         <li>
            <p class="para_item">The  <b class="uiTerm">Via</b> keep-out area defines an area of the board where vias are not permitted (but routing is still allowed). 
            </p>
         </li>
         <li>
            <p class="para_item">The <b class="uiTerm">Layers</b> option defines which layer of the board the keep-out area applies to:
            </p>
            <p class="para_item"><b class="uiTerm">Current</b> layer means the keep-out area applies to the surface of the board the area is sketched on (either top or bottom layer). This option is available for all keep-out area types.
            </p>
            <p class="para_item"><b class="uiTerm">Both</b> layers means the keep-out area applies to both the top and bottom layers of the board. This option is available for the  Routing,  Placement and Placement Group keep-out area types.
            </p>
            <p class="para_item"><b class="uiTerm">Inner</b> layers means the keep-out area applies only to layers within the board. This option is available for the Routing keep-out area type only.
            </p>
            <p class="para_item"><b class="uiTerm">All</b> layers means the keep-out area applies to all board layers. This option is available for the Routing keep-out area type only.
            </p>
            <p class="para_item"><b class="uiTerm">Unowned</b> means that the keep-in area is not owned by either ECAD or MCAD.
            </p>
            <p class="para_item"><b class="uiTerm">MCAD</b> means that the keep-in area should only be modified in the Mechanical CAD system.
            </p>
            <p class="para_item"><b class="uiTerm">ECAD</b> means that the keep-in area should only be modified in the Electrical CAD system.
            </p>
         </li>
      </ul>
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