1. Navigate to the appropriate component from Setup:For packages, enter Packages in the Quick Find box, then select Packages.For Apex classes, enter Apex Classes in the Quick Find box, then select Apex Classes.For Apex triggers, from the management settings for the appropriate object, go to Triggers.For Visualforce pages, enter Visualforce Pages in the Quick Find box, then select Visualforce Pages.
2. For packages, enter Packages in the Quick Find box, then select Packages.
3. For Apex classes, enter Apex Classes in the Quick Find box, then select Apex Classes.
4. For Apex triggers, from the management settings for the appropriate object, go to Triggers.
5. For Visualforce pages, enter Visualforce Pages in the Quick Find box, then select Visualforce Pages.
6. Select the name of the component.
7. Click View Dependencies for a package, or ShowDependencies for all other components, to see a list of objects that depend upon the selected component.