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      <title>Screen Angle</title>
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      <div class="title_topic2" id="xps10_pagetitle">Screen Angle</div>
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      <p class="para_topic"><img align="bottom" src="../graphic_library/icons/toolbars/analysis/analysis/screen_angle.gif" border="0">Use Screen Angle to create a temporary display of a protractor on the view plane, based on 2D screen positions that you specify. Use this tool whenever you want to get quick information for an angle. At times, you may need to perform a measurement, but do not have objects available to use with Analysis&rarr; Angle. This tool allows you to understand deviations the way you would by holding a protractor in front of an object. 
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      <p class="para_topic">Screen Angle is useful any time you need to get an angle measurement that does not have to have high precision.</p>
      <div class="title_division">How to Get a Simple Screen Angle</div>
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            <p class="para_item">Choose the Screen Angle icon from the Analysis Toolbar. Moving the cursor to the graphics window shows a protractor cursor tip, to remind you that the tool is active.</p>
            <div class="figure">
               <p align="center"><img align="bottom" src="graphics/screen_angle_cursor.gif"></p>
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            <div class="title_figure">Screen Angle Cursor Tip</div>
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            <p class="para_item">Specify two points or screen positions to get a base line. Protractor animation begins. </p>
            <p align="center"><img align="bottom" src="graphics/screen_angle_eg1.gif"></p>
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            <p class="para_item">Once you have a base line, move the cursor across the screen. As you move the cursor, the size of the angle displays and updates constantly to the third screen or point position.</p>
            <p align="center"><img align="bottom" src="graphics/screen_angle_eg2.gif"></p>
            <p align="center"><img align="bottom" src="graphics/screen_angle_eg3.gif"></p>
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            <p class="para_item">Click MB1 to terminate the dynamic aspect of the Screen Angle protractor and show the final angle and lines. The tool is still active, and you can make other protractor measurements.</p>
            <p align="center"><img align="bottom" src="graphics/screen_angle_eg4.gif"></p>
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      <div class="title_division">Tips for Using Screen Angle</div>
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         <li>
            <p class="para_item">Use MB2 to cancel the tool.</p>
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         <li>
            <p class="para_item">Select Refresh (F5) to clear the display.</p>
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         <li>
            <p class="para_item">Hold the control key during base line definition to snap the base line horizontal or vertical, whichever direction the cursor is closest.</p>
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            <p class="para_item">You can zoom and pan the model to collect different measurements. </p>
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         <li>
            <p class="para_item">You can invoke the Protractor from within other tools. </p>
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