The Saved Reports panel lists three types of saved reports:
Trellix Default report— These are reports that are listed by default which can only be duplicated and run but cannot be edited or deleted.
Derived from report "{report name of Trellix Default report}"— These are reports that are duplicates of Custom Default Reports. The duplicated reports can be edited as well as deleted. Note that editing is restricted to modifying the data filter options that is, you can edit the data filters but not the report presentation options.
User defined report— These are reports, which are created when you click New from the main screen of Custom Reports page. In a Custom user defined report, you can define the data filter options as well as the report output display preferences (such as whether the report should be generated as a bar chart or a pie chart etc.)