title: How do I standardize the orientation of several PLY models in MeshLab?
body: <p>I have a bunch of .ply models of human faces. I want to open them one at a time in MeshLab, but each time in the same orientation. How do I reorient the planes in MeshLab so they better align with the faces?
  In other words, I want to view each face in a standardized orientation, such as the Frankfort Horizontal Plane <a href="https://i.stack.imgur.com/84G7u.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/84G7u.jpg" alt="picture attached" /></a>  parallel to the ground, so that when I go to filters --&gt; normals, curvatures,
  and orientation, --&gt; transform: rotate and I rotate the faces about a fixed axis and center of rotation, each face is fixed so that the Frankfort Horizontal Plane is parallel to the ground.</p>