Hi
how do i make a new vertex in 3ds max
Create new geometry (ie plane, box, sphere - go under 'standard primitives') and once you do that, right click and press 'Convert--> Editable Poly.' Press 1 to switch to vertex selection tool, and model away.
If you want to make new vertices on existing geometry, try using the cut or slice plane tool.
You can (iirc) add a vertex by converting your model to an editable mesh/right click/add vertex...i wouldn't though, more trouble than it's worth...