Sorry to ask so detailed questions, it is really helpful to know how to build a PDK for a beginner.
I have solved the last problem by accepting the suggestion. I can see the vias option when i press "o" in the editor. But I try to put the vias into the layout editor, they are not visable (or empty).
I check the other technology PDK, it always has a "via" view in the library. For example, named M1_M2 with "via" view.
I donot have such cells in my library, I try to produce them by creating CDSvia in the technology file manger, but they are in the view of "layout"
Did I miss some tech layer rules in there ?