Mstn allows users to open pdfs directly. Also supports pdfs as Ref attachments. Mstn also allows external formats like DWGs and 3dm files to be placed as Cells using the Cell Library, Place Cell tool.
This is very useful, and reinforces Mstn's capabilities as a scalable interop, integration platform.
It would be great to extend this to pdfs which is a widely used format, making up a huge portion of info on any project.
See also need to preserve printing, pdf metadata: MSR-I-2337
See previous discussion