2008

Diagonals on the default Cylinder primitive
Diagonals are normally invisible, but in 3ds Max they appear as dashed lines
when you use the Turn or Edit Triangulation tool. Unlike edges, diagonals
cannot be transformed, or acted upon with tools like Chamfer. This is different
from the hidden edges in editable mesh/Edit Mesh objects, which are actual
edges and can be made visible, transformed, and manipulated with any editing
tool.
7758 | Glossary