Yes, what you define in Options will work for NEW models.
To change format in already existing models, you need to edit the Workspace Format.
To your screenshots:
In WS Format, I can see display level ‘Entities’. However, the entity of which Properties form you opened has display level ‘Attributes’ as its attributes are displayed. It means that format of this entity is different than format of WS.
In this case, if you edit WS Format, format of the entity remains untouched.
Solution A: Edit format of the particular entity: right-click the entity | Format | Entity tab | Display Data Types.
Solution B: - If you like to unify format of all entities in this WS. - CTRL + A to select all, right-click any | Format and define the format settings.
If you have any questions, please write me back. Thanks!
Vladka + TDM Team