This option is only available from the Console Default User Settings task.
To allow the other user IDs to choose the console user interface style they prefer, select Allow user to change the UI style. Otherwise, all user IDs must use the default UI style that the access administrator has set from the Console Default User Settings task. (Note: If the default set by the access administrator is to not allow other user IDs to choose the user interface and the default user interface is the tree style. The SERVICE user ID or a user ID with service roles continues to use the classic style user interface.)