How do I make bulk changes to all persons?

Export all the person records from Persons tab > Export option (upper right green button) and select “Persons export” You can then make modifications to this spreadsheet, and save as a csv file. To import, click on the Import button to upload the updated worksheet in the upper right-hand corner of the “Persons” page. Choose the updated CSV file and click Import. You will need to understand and map the values. When you click on import again any errors will be available and a report will be generated. Once cleared you can try the process again. Make sure to overwrite current values, otherwise duplicates will occur. All changes will take effect immediately.