Hello,
Someone in my company was able to create this BPMN Task with a small plus sign in red, but she doesn’t know/remember how to do it again.

The Activity Marker is not assigned to ‘Sub-Process’ so I’m confused here. And the plus sign stays even if I changed the Activity, the Task Types and any of the Activity Marker.
It is not an icon, and it’s not a separate image that she added to it. It does have an ‘undefined’ text shown on it if I put the cursor on the plus sign. Note: If I click on the plus sign, the plus sign will disappeared.

Any ideas?