Hi Miguel,
In reference to you question, after activating the BF 'SEGED_HV' you can use the segmentation in 2 scenarios; one with TREX, other without TREX.
- Segmentation (Normal and High Volume) - TREX not required
- Segmentation with High Volume - TREX is must
I hope this clarifies the doubt on trex.
Regards,
Kunal Bansal