There are two different way to modify a report.

1. Find the report you wish to change in the "Reporting" menu, then click the 3 dots to the right of the report name and click on "Modify Report" -

2. Open the report, or make sure the report is made active if already open, by clicking the report name in the list under the 'My Reports' section. Once the report is open and active click the "Change Report" button on the toolbar area at the top of the report.

For a detailed explanation on modifying reports open the online help press the F1 key from the Akixi Reporting screen and go to section 18 - Changing Reports.