Curve Point Editing Methods
Curve point selection methods
Use the following commands to select curve points to edit:
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Select Operation
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Command
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Location
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Select multiple points
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Drag a box around the points
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Graphics window
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Select multiple points along a curve between two selected points
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Select a point, and press and hold down SHIFT while you select a second point along the same curve
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Clear all point selections
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Right-click and choose Deselect All Points when one or more points is selected
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Curve point manipulation methods
Use the following commands to manipulate curve points:
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Edit Operation
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Command
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Location
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Create a soft point
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• Hold down SHIFT while you select and drag a free point to snap to the nearest geometric entity. When  Show Original is selected, you can snap to the original curve• Click > > and select and drag a free point to snap to the nearest geometric entity |
Graphics window
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Move a soft point along a curve, edge, datum plane, or surface
Move a free point according to the movement constraint you set
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Select and drag the point
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Change a soft point reference
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Select the soft point, right-click, choose Pick Soft Point, and select a new reference
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Flip a soft point parameter to the opposite end of its reference
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Select the soft point, right-click, choose Flip Soft Point. Also flips the direction of the soft point tangent when the first constraint is G1, G2, or G3.
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Override the selected drag constraint to move a point in a straight line that is normal to the active datum plane
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Hold down ALT while you select and drag a point
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Override the selected drag constraint to move a point horizontally or vertically along the plane of the screen
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Hold down CTRL + ALT while you select and drag a point
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Delete points
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• Select points, and press DELETE
• Select points, right-click, and choose Delete
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Nudge a point
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Select a point and press UP ARROW, DOWN ARROW, RIGHT ARROW, or LEFT ARROW
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Make a curve smoother
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• Select points and click  Smooth• Right-click points and select Smooth |
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Reduce the number of points in a curve
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• Click  Simplify• Right-click points and click Simplify. |
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Move a soft point to an exact location
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Modify the Type and Value
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Point tab of the Curve Edit tab
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Move a free point to an exact location
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• Specify X-, Y-, and Z-coordinate values
• Select the Relative check box to treat the x-, y-, and z-coordinate values as offsets from the original position
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Place a soft point on a specific reference
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Select a soft point, and do one of the following:
• Click the References collector
• Right-click the graphics window, and select Point Reference Collector
Then select a vertex, point, curve, edge, axis, datum plane, facet, or surface for the soft point to lie on
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Point tab of the Curve Edit tab, under Soft Point
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Offset a soft point from a plane to specify a distance along a reference
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Select a soft point, and do one of the following:
• Click the Plane Reference collector
• Right-click the graphics window, and select Point Plane Collector
Then select a plane from which to offset the soft point
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Point tab of the Curve Edit tab, under Soft Point
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Nudge a point
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• Select a point and click  ,  ,  , or  • Select a point and enter a value in the Adjust box |
Point tab of the Curve Edit tab, under Point Movement
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Apply a dragging constraint to the selected point
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Select a constraint from the Drag box
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Apply an extend constraint to the nearest endpoint
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Select a constraint from the Extend box
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• When you snap a free point of a planar curve or a curve on surface (COS) to a datum plane or to any another intersecting surface, an offset from plane soft point is created.
• To nudge a point using the arrow keys, you must first activate the graphics window. You cannot nudge a soft point.
• Planar curve points can only be dragged using the Free and Horizontal/Vertical methods. The Free drag method is the only one available for curve on surface (COS) curves.
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Video
Watch a video that shows editing the position of curvature and acceleration control points within their degree of freedom.