Elevation Cross Section - switch basement off?

[Sydney23]

Sorry for delay in thanking - thank you! I guess that won't auto update as Layouts can, but is a workaround for final submission once all the messing around with HDP is complete. Can turn off 'walls / foundation' in display settings but that just exposes all the contents of the basement - stairs, gym equipment, etc.

New issue - can't find a way of removing wall finishes on the side elevation (eg brick hatching), which makes the side elevation quite busy, simply want an outline of the building envelope (above ground) and windows/doors.