Assembly Feature Scope
When you create an assembly
feature, you specify which components you want the feature
to affect by setting the Feature Scope
in the PropertyManager.
To set the feature scope:
Set the following options under Feature
Scope in the PropertyManager:
All components. Applies the feature
to all components in the model every time the feature regenerates. If
you add new components to the model that are intersected by the feature,
these new components are also regenerated to include the feature.
Selected components. Applies the feature
to the components you select. If you add new components to the model that
you want the feature to affect, you need to use Edit
Feature to edit the feature, select those components, and to add
them to the list of selected components. If you do not add the new components
to the list of selected components, they remain intact.
Auto-select. (Available if you click
Selected components). Automatically
selects all components intersected by the feature. Auto-select
is faster than All components
because when you make changes to the feature, only the components on the
initial list are regenerated (instead of all components in the model).
If you click Selected components and
clear Auto-select, you must select
the components in the graphics area you want to include.
Components to Affect 
(Available
if you clear Auto-select). Select
the components to affect in the graphics area.
You set the feature scope for a feature in
a multibody
part in a similar manner by applying the feature to All
bodies or Selected bodies.
To edit the feature scope:
Right-click the feature in the FeatureManager
design tree and select Edit Feature.
Make changes under Feature
Scope in the PropertyManager, then click 
.