You can clone a report as a base to build another report. You can use this feature, for example, to build the same report with two different summary or visualization representations.
To clone a report:
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Hover over the report in the reports data table or open the report to view.
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Under the More options button
The new report opens. It will have the same name as the original report but preceded by "CLONE -". If you want the report to reflect the latest data, click the Update Report button 
If a report has multiple clones with similar names, you can use the Created time stamp in the reports data table to identify the most recent clone.