Feature Request: PDF File Name

Request that the name of a PDF file default to the name of the source, rather than Untitled. Or, in the case of layouts

Source + Layout Name.PDF

or have an option to do

Layout Name.PDF

This would require some character translation because layout names permit / while that would be a no-no in a file name.

In Rhino 8 for Mac, the Print > Destination > Rhino PDF option should autoname the resulting PDF to match the file name (if saved).

Is this request to have the Export > PDF option do something similar?