It might be simple, but I can’t find hoe to do it:
¿How can I rotate a line of vertices from a point?
Here’s is the example:
Welcome 
…
select the point; Shift-S cursor to selected; . pivot point 3D Cursor ; select line; R mouse move and rotate
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You can also make that Vert the active one (it will be white instead of orange) and then switch to rotate from active:
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Someone learns somethign every day… never thougth of this… 
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G-De, Okidoki, Thank you very much!
The problem is that i want the vertexs to move allong the edge, so I keep the from, is that possible?
Thanks!
You should really find yourself some beginner video tutorials and watch a course or two. It’s best to get these basic things out of the way in one go with video tutorials.
Not possible, even with shrinkwrap workaround:
You must cut the desired line with the knife tool an work on the mesh:
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So… you want not to rotate but to shear the whole line along there neighbour edges ?? And then using @G_De’s mentioned trick… !?
Possible and easy - just cut a new line with knife tool or bisect and dissolve the old one.
yes! that’s it
Thanks that’s the easiest solution
Sure, thanks!
THat’s it, thank you!