How to move CVs along or parallel to an arbitrary vector, relative to their curve or surface, or in relation to a specific point.
If the CVs you want to move are in a selection set, turn on Use sel sets in the Transform CV control window.
In the Control Panel, double-click the Transform CV tool
to open the control window.
In the Transform CV control window:
Pick the CV or CVs you want to move. To select additional CVs, hold
and click them.

Press a mouse button on a hull line, reference vector, or reference plane and drag to constrain the CV movement.

Using PROJ mode to move a CV along a vector
You can also use the Hot Spot Interface to switch between options in order to reduce mouse movement across the screen.
In the Control Panel, double-click the Transform CV tool
to open the control window.
In the Transform CV control window:
Pick the CVs you want to move. To select additional CVs, hold
and click them.

Drag a mouse button to move the CVs:
Drag the
to move along the normal.
Drag the
to move along the U direction.
Drag the
to move along the V direction of a surface.

Moving four CVs along the surface normals.
The Transform > Modify > Move CV Normal tool in the Palette works in a similar fashion.
In the Control Panel, select the Transform CV tool
.
In the Transform CV section of the control panel:
Click the CV you want to move. To select additional CVs, hold
and click them.

Click the arrow on the hull you want to move the CVs along, then drag to move the CVs.
You can also use the Hot Spot Interface to switch between options in order to reduce mouse movement across the screen.
to move the object’s pivot point to the point toward or away from which the CVs will move.
to pick the CVs you want to move.
to scale the CVs out (away from the pivot point) or in (toward the pivot point).