Problem with Layout in MWO

Hello everyone
I have designed a schematic in microwave office now i am going to create its layout
but i have some problems
i know the capacitance, inductance and resistance of my lumped elements but i don't know how i could get their physical dimensions
and the other is when i want to export the layout which is created from the schematic as dxf the enclosure properties is not available when i import this file to EMStructure