You can reorganize the terms in Secteur d'activité using their drag-and-drop handles, and group terms under a parent term by sliding them under and to the right of the parent.
Name Operations Weight
Aeronautics
Infrastructure and construction
Tourism - Show
Security - Malevolence
Public services
Services
Health and medico-social
Nuclear
Engineering
Information technology
Agri-food
Training - Education
Railway
Energies
Eco Industry
Industrial Goods / Manufacturing
Bank
Automotive
Transportation & Mobility