Move a node without distorting the stroke

Hello all,

I wonder is there any way to move the node with its BCP along the stroke without distorting the shape.
This feature is available on Fontlab 6. My instructor has shown me on his computer, so I cannot do screen cast of it but adding a screenshot that would explain my question better.
p.s.: I have tried alt+move. It is not that I am looking for.

To what effect do you need that?
If you just need to have a point at a different position, add it and remove the old one.

To readjust the stroke more quick and smoothly. I am doing with that way but I think it would speed up the process