I am using the firmware 2.0.1on Max.
I have noticed when I export my scribbles on a PDF, the type of annotation that is saved inside the PDF file is PolyLine (or connected lines, or polygons). This is problematic, because many applications, including Preview in MacOS and the whole Apple PDF Engine do not recognize that particular type of annotation and do not display them correctly. On the other hand, PDF provides another annotation type called Ink (or Pen), that works very similarly to PolyLine, except that it renders smooth curves, and all PDF viewers support it. It would be great to have Max save its scribbles using Ink.
In simple PDF terms, the notation for PolyLine is
/Subtype/PolyLine/Type/Annot/Vertices [COORDINATES] while for Ink it is
/Subtype/Ink/Type/Annot/InkList[[COORDINATES]]. The same set of coordinates works for both, so this must be a very easy feature to implement.