Activate Assembly activates the whole assembly after you have activated a component or edited a feature.
Note: When a new part is added to an assembly, it automatically becomes activated.
Example:
In the example, Pin
3 is the active component. All modifications are made to the active
component.
The color of the non-active components of the assembly are changed.

Right click on the assembly name in the Assembly Tree and select Activate Assembly.

The main assembly is now active and all assembly components are displayed in their original colors.
