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Constraining Slopes of a Spline
While in Add Constraints mode 
, you can constrain the slopes at either end of a spline.
Note: You can also dynamically modify spline slopes in Select 
mode.
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Demo: Press the button below to view a short movie demonstrating the function: |
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Constrain slopes
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Click the Add Constraints button
, from the Sketcher toolbar.
The cursor changes to a black pointer and cross-hair. 
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Click on the spline. Dashed lines representing the slopes at either end will appear.
Note: The direction of the slope depends on how the slope was defined; the slope proceeds in the order in which the spline points were picked.
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Click the desired slope and use the Constraint toolbar to add the desired constraints.
Example:
Click the upper slope and then the diagonal line.
Click the Normal button 
in the Constraint toolbar. The slope is now normal to the diagonal line.
Now click the lower slope, and click the Vertical 
button in the Constraint toolbar.
Both slopes are now constrained.
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