Elevation Cross Section - switch basement off?

[Sydney23]

Tried it and it works fine. It will get me to the finish line but I can't help wondering...

It's a bit disappointing that the software can't do this itself, I would have thought it's something many people would need. It also means that the relationship between the live plan and layout is broken (I assume), which could become very tedious if ongoing changes were required to the live/master plan.

Any one know if this is something (deliberately) left out of HDP and saved for Chief or is there some technical reason more automation is impossible?

Thanks.