DC Entry is a replacement entry page which you can choose to use instead of the native Salesforce entry page. DC Entry mirrors the native entry page of Salesforce. It shows duplicates while filing or editing the record. Immediately see if there are any duplicates in the record.
All objects added to the Salesforce native entry page by the User will be mirrored on the DC Entry page. Clicking on one of the Objects will navigate you to the Object's DC Entry page.
If you add new fields to any of your Objects, they will show up at the DC Entry page too. You might need to log off / log back in again since DC entry is only updated once per login session.