Copying Plan to a new PL1

[Dave]

Is there any way to copy a floor plan from one PL1 document to another in Home Designer Suite 6.0? I created my terrain contours in a blank document and now I want to add a floor plan created previously.

I've tried multiple selection marquee (shift-drag) and Move Area selection marquee but neither of these selections allow copy/paste. I've tried to select the wall segments sequentially using typical Windows selections (ctrl-click, shift-click, etc.) but haven't found anything that works.

I see that I can export DXF files but apparently can't import them.

Thanks in advance for any suggestions.