Hi pavlinao80321508,
Usually in an AB Test workflow you have a Split where you segregate the target population into two random samples of say 10% each.
Finally you enable the complement of Split to move the remaining 80% population for winner delivery.
So, you will have to enable complement transition. Hope this is what you were looking for.
If my understanding is wrong, can you please explaining your question with a screenshot and example?
Regards,
Vipul