Curve Overview
You can create several types of 3D curves by using these methods:
You can then use the curves to create solid model features. For example, you can use a curve as the path or guide curve for a sweep feature, as the guide curve for a loft feature, as a parting line for a draft feature, and so on.
You can turn the display of curves on or off.
To toggle the display of curves:
Click View, Curves. A depressed icon next to the menu item means curves are visible (except for curves you have hidden individually).
To hide or show individual curves:
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Right-click the curve in the graphics area or in the FeatureManager design tree.
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Select Hide or Show.
Individual curves always are highlighted when you select them, even when hidden.