Export does not take marked objects into consideration. I tried to export my MSC (some intervals were marked) to standard Z120 but the result .mpr file does not contain any extra notation.
Actually, the marking is implemented only as a different color of a Visio object (it's a bit more tricky in case of marked events), i.e. there is no label to specify marking in the objects of SCStudio stencil.
Hence, SCStudio could not recognize markings when reading a Visio drawing.
Bug report -> Feature request.
Done: Marking works during export to Z.120.
ToDo: - marking sensitive extraction from Visio drawing to internal data structure of SCStudio
- marking sensitive extraction from Z.120 to internal data structure of SCStudio