10. Once you have changed a batch of usernames, the whole list will be displayed again with changes in place.
If you want to change some more usernames, then it might be a bit tricky if the list is not in the order that you need. In this case, you may use the filter to display only unchanged data.
For example, if your original list contained the usernames Myschool01, Myschool02 etc, and you have changed some of the usernames to Myusername1, Myusername2 etc, then type ‘Myschool’ in the filter to only display usernames that have not yet been changed.