How to turn off triangles in 2d output in detail center

Hi, how to turn them off? They are not showing on preview window, but when I try to insert the 2d detail, they are showing.

I recently created new workspace, could you tell me please which setting controls this?

Looking at this post in Wiki, this option is not in the menu

 https://communities.bentley.com/products/prostructures/w/structural_drafting_and_detailing__wiki/8365/green-triangles-in-2d-group-drawings 

Prostructures CONNECT 7 V10.07.01.59