The list of users can be toggled between Full list and Address book styles by clicking the link at the top of the page. The address book style will only show user IDs beginning with the selected letter and is best for large installations with many users.
To add a new user, click the New button. To modify a user, click on the user ID. To delete a user, select the row by clicking anywhere to the right of the user ID and then click the Delete button.
NOTE: Users with open issues assigned to them cannot be deleted. Care should be taken when deleting a user as it is possible the user may have created issues that are still open. If your workflow uses the “Must be assigned to original creator” rule this may cause problems.