When you open a part saved as a library feature, the SOLIDWORKS application adds a References and a Dimensions folder in the FeatureManager design tree under the library feature.
The References folder lists the references that you need to specify when inserting a library feature.
All library features include at least one reference, the Placement Plane . Other references are added when you create the library feature.
When creating these references, you can:
- Dimension library feature entities to the base feature.
- Add relations (for example between the sketch origin and a library feature entity).
Library features with face references such as fillets do not need reference dimensions.
The Dimensions folder lists the dimensions that belong to features marked as library features.