By default, room separation lines are visible in plan views and 3D views. Use a Visibility/Graphics setting to change their visibility in a view.
- Open a plan view or 3D view.
- Click View tab
Graphics panel
(Visibility/Graphics).
- Click the Model Categories tab.
- In the Visibility column, expand the Lines group.
- Select or clear <Room Separation>.
- Click OK.
You can also right-click an individual separation line and use a Hide in View option.