How to move an end point

Grasshopper
1

I’m trying to move the edge points of this surface to different heights but the control points don’t allow me to. Is there any way to do it
Thank you

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2

There are countless ways of doing it…
It only matters what is your final goal…

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4

Thank you so much for your reply. I tried your method but the issue is i want a single point to be lifted at a time and on a surface not a curve. Something like this but a surface in this shape. Your method moves the full curve( image is in front elevation)

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5

What you have is a trimmed surface, not a surface. What this means is there is no nice way to do that. If you don’t understand nurbs surfaces you can look here: https://wiki.mcneel.com/rhino/nurbssurfaces