About Splines | |||||
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Closing Splines Using the Close Spline Option
When creating a spline, you can close it by right-clicking the last point and selecting Close spline.
The spline is closed in such a way that it is continuous in
curvature at the closure point.
It is also possible to close a spline while editing it. For more information, see Editing a Spline.
Closing Splines Using the Close Arc Command
When applying Close arc 
to a spline trimmed using Trim 
, the spline is set to its original limitation.
For example, if you create an open spline (you did not right-click and select
Close Spline to close it) which you
trim like this:
After clicking Close arc , the spline looks like this:
