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- Use the Edit Tool on the curve you want to edit. By default, Edit Control Points is active in the Inspector Bar and local menu.
- The control points are highlighted at the ends of frame segments. Each point can be clicked and dragged manually or assigned values in the Inspector Bar or Coordinate Fields.
- Switch to Edit Fit Points.
- Now the points through which the spline passes are highlighted. If the spline is open, you can use the green points to change the slope at the spline ends.
Note: Control points and fit points are not available for Bezier curves. For details on node-editing Bezier curves, see Curve Properties.
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You can control how each node controls the curvature by selecting a node, and right clicking to open the local menu. In the local menu there are three options for controlling the curvature of a node.
Equal Curvature at point — This is the default. When selected, adjusting one of the green control handles causes the paired handle to change an equal distance, but the handles remain locked to a common control line. This option makes the curve smooth and equal on both sides of the node.
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You can use the Selection tool functions to edit nodes by turning on the Selection Mode. Selection mode is available from the local menu or from the Inspector bar. 
While in this mode you can select multiple nodes and move them, rotate them, and scale their collective size just as you would any other object using the selector.
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