MOV NOD (move node) allows you to move existing node
points on a spline. For easier manipulation, temporary
markers (x) are automatically displayed at each existing
node point of the spline. 

Select a node point to move. The node closest to the
indicated position is automatically selected.

Indicate a new position for the selected node point, using
a Position Menu option. The node point is moved to the
indicated position and the spline is recreated, passing
through the new node point position.

With a 2-D spline, the new position for the node is
projected to the construction plane of the spline, keeping
the spline 2-D. To change the plane of the node position,
set the 2-D/3-D option first.

With a 3-D spline, the x, y, z world coordinates of the
point are used.
