Select the participants and click on 'Edit'

Open

Click on the ‘Select Field’ dropdown and choose the field.

Open

Enter the value for the field

If you want to clear the old value of the field or set it to blank, keep the field value empty.

Click on update

Click ‘Yes’ to confirm clearing of the previous values of the field

Note:

The registration level custom fields also appear in the ‘Select Field’ dropdown where you can select the custom field and update it

Select participant and click on ‘Delete’

Specify the reason for deletion of participants and click on 'Yes'

A report of the deleted participants is sent via email