There are several ways in which you can edit a 3D curve.

To adjust the placement of points on a curve:

1. Select the curve and press T to activate Translation mode.
2. Select Vertex from the Viewer toolbar Object Selection menu.
   

   Viewer window Object selection buttons A. Vertex.

   The points on the curve transform into editable points with tangent handles.

   

   3D path in Edit/Delete Points mode.

3. Double-click any point on the curve and translate the point or its handles. Ctrl-click a point to deselect it.

To add points to a curve:

1. Right-click the curve and select Path Options > Add Points Mode from the contextual menu. The cursor becomes a crosshair.
   

   3D path contextual menu A. Add Points Mode

2. Click the mouse in the Viewer window to add a point to the end of the curve.
   • To add a point to the beginning of the curve, right-click instead.
   • To add a point inside the curve, middle-click.
3. Press Escape to exit Add Points mode.

To delete points on a curve:

1. Select Vertex mode from the Viewer toolbar Object Mode menu.
2. Click the point to be deleted on the curve.

   To select multiple points, Ctrl-click or Spacebar-drag.

3. Right-click the curve and select Path Options > Delete Selected Points from the contextual menu.