Campaign built-in reports are grouped in the Reports tab of the Adobe Campaign interface.
Use the search fields to filter the displayed reports.
Then click the report you want to display.
The Back link at the top of the screen takes you back to the list of reports.
Other possible actions on a report being edited are detailed in this page .
Reports that are specific to a campaign or a delivery are accessible via their respective dashboards.
The principle is the same for lists, services, offers, etc. as shown below: