Export Rhino render materials

Seems to me I once could export Rhino materials for use in a different file. I am now working on a series of objects that all want the same materials for sketch presentation. Some of these objects were modeled back in Rhino v1.
I can’t find the export material (library) anywhere in v5x64. Help please…

Open the Material Editor panel. Right click one of the materials and choose “Save to file…”