Hi mira_,
As it was called a Technology Preview, I would see it as a hint, not a request-able feature working on all hardware setups; I might be wrong here. So please ask Tech Support why that is.
Can you see them when you produce lines while set to a different color and size? See images. So you have some more data when you contact Support.
Anyway, this is something that Tech Support should be able to answer.
https://www.maxon.net/en/support-center
All the best

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