[Therion] Hiding centreline within a scrap, while showing it for surveys

[MD]

> On 7. Dec 2019, at 09:53, Tarquin Wilton-Jones via Therion <therion at speleo.sk> wrote:
> 
> I want to hide the centreline within bar at baz,

So qux has data for bar at baz?
I generally have one piece of centerline per scrap and include only the centerline data when there’s no scrap.

—max