Activate the option in the Settings menu to use Smart Move. Smart Move allows linear or rotational move and copy, constrained to axis between lined up controllers.
Highlight any object or control point you want to modify by making an intersection with Grabber on your drawing hand.
When you align both controllers, the preview axis will appear. Any grab interaction performed when the axis is visible will be constrained by the axis.
(To move along the axis, align controllers to go in the same direction)
(To rotate an object around the axis, face each front of controller)