How to change the shape of a static mesh by changing the vertex position data

For example, as shown above , how can I change the shape of the box by changing the top four vertices , thanks.

I don’t think you can, unless you edit the Engine code itself. And even then, it’s questionable if it’s possible.
But this can be achieved by using a procedural mesh component. As long as you know the indexes of the vertexes you want to change, you can manipulate their transform before generating the mesh.

Thank you, I have found the way, using PMC or RMC.