Activate/Deactivate

Right-click object (De)activate
Sets the Activation status of a selected object. The object's children and dependents inherit the activation status of the parent. Learn About Inheriting Activation Status.
This tool is useful for "what if" scenarios and temporary changes. Activity and symmetry options will not be saved to the subsystem file.
 
For the option:
Do the following:
Object
Enter the name of the object.
Object Active
Select if you want the object active during a Simulation.
Symmetric
Enabled when you modify component pairs (or brothers):
yes - Modify activity of both components in a pair.
no - Only modify activity of the selected component.
When you modify a single component, this option is disabled because a single component is by nature asymmetric.