What does the white line that divides an activity in Manage and Dispatch Console mean?

Summary:

Content (required):

Hello Oracle Community;

I would like to know what it means when an activity has a white line that divides it. The activity types that I have configured do not have the "Enable segmenting and extended duration" feature enabled, so I don't understand why a non-segmented activity can have this feature.

Regards.

Version (include the version you are using, if applicable):

23B Service Update 7 (23.5.7.0.2)

Code Snippet (add any code snippets that support your topic, if applicable):