When creating an active topology child alternative, you may notice that the elements added to the child scenario also appear in your model when the base scenario is the current scenario.

To create an active topology alternative so that the elements added to the child scenario do not show up as part of the base scenario:

1. Create a new model.
2. Open the Property Editor.
3. Open the Scenario Manager and make sure the Base scenario is current (active).
4. Create your model by adding elements in the drawing pane.
5. Create a new child scenario and a new child active topology alternative as described in the following steps:

1. In the Scenario Manager, click the New button and select Child Scenario from the submenu.
2. In the Property Editor, which should now display the properties for the newly created scenario, select <New...> in the Active Topology field.
3. In the Create New Alternative dialog box, type the name of the new child active topology alternative name then click OK.
4. In the Scenario Manager, select the new child scenario then click the Make Current button to make the child scenario the current (active) scenario.
5. Add new elements to your model. These elements will be active only in the new child alternative.
6. To verify that this worked as expected:
7. In the Scenario Manager, select the base scenario then click the Make Current button to make the base scenario the current (active) scenario. The new elements are shown as inactive (they appear grayed out in the drawing pane).
8. In the Scenario Manager, select the new child scenario then click the Make Current button to make the child scenario the current (active) scenario. The new elements are shown as active.