[MX V8i SS2] CAD export - MS levels

Hello,

I would like to create my finish drawings in PowerDraft (instead of AutoCAD). I have exported my model as a 2D dgn drawing but in exported file I am not able to edit element parameters such as levels - the option is "greyed" as not-editable. Should I disconnect them from something or explode? I am such "green" in MS :(

Regards
Aleksander Zamorski