Tools > Measure > Snaplock
Measures from a repeatable point on a selected piece of geometry.
Smart Review generates snaplock points at fixed locations on a given piece of geometry for use during snaplock measurement. A snaplock point is displayed as either a small square or round tag point on a surface, as shown in the picture below. The location of a given snaplock point is always in the same place for a specific type of geometry, making snaplock measurement more precise because it is repeatable.
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Click Tools > Measure > Snaplock.
You also can access this command by pressing F8 or by clicking Snaplock Measure on the Tools MiniBar.
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Select an object.
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Accept the object by left-clicking anywhere in the view.
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Select the snaplock point on the object from which to measure.
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Double right-click to exit the command before selecting the snaplock point.
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When a snaplock point is a control point, which is represented by a sphere, the measurement is automatically taken from the center of the control point.
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When measuring a distance, you must access the Snaplock command twice because it takes two selection points to define the distance to be measured.
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Because measurements occur for every single selection point, use the Tools > Measure > Edit Collection command to delete any unnecessary measurements. For more information, see Edit Measurement Collections.
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You can use any of the standard motion commands or view manipulation commands to move to a different part of the model between defining snaplock points.
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Snaplock measurements allow you to define formats for the line, snaplock points, and text.
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The linear distance and cumulative distance display in the Text window. In addition, the Text window displays the location of each initial snaplock point as you place them.
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If you have rubber banding turned on, you can cycle through the snaplock points to select the starting point for the rubber band. Right-click to cycle through the available points.