# Feature Dependency
An associated element for visually viewing a particular element.
Usage：After selecting a part, fit or assembly feature in the viewport or feature list, right-click on [parent-child relationship] to display the parent-child relationship table of the feature in the viewport.
- Picking up different items shows the parent-child relationship in the following table：
| Items picked up | Parent features | Child Characteristics |
|---|---|---|
| Parts (regardless of level) | Select the name of the part in the instance list | l The fit, feature in the assembly, only the part name is displayed when there is no fit and featurel When there is an external reference, the part where the external reference is located is displayed |
| Fit | Fit the two parts | Fit |
| Assembly sketch | Steps 1 Sketch the plane or the parts to which the plane belongs2 The external elements referenced in the sketch, the lines of sketch 2 in the figure and the lines of parts 3-1 add constraints | Sketch, features created using that sketch |
| Assembly stretch cut | Sketch, direction, excision | Stretch excision features |
| Benchmark | The element or part to which the element belongs when creating the benchmark | References to features, fits created by this benchmark |
| Arrays, Mirrors | Parts for the arrayDirections or parts where the directions are, sketches | Features and generated examples |