If you use Redtail CRM's Seminar Management tool, one of the fields you use when working with Seminars is Seminar Attendee Status.
To add a new Seminar Attendee Status to your database, under your Manage Your Account menu, select Manage Database Lists:
The body of the Manage Database Lists page contains all of the lists that you can edit in expanded form. You can work with individual database lists by clicking their name in the Lists box to the right:
After you've clicked Seminar Attendee Status List, your page will refresh displaying only this list:
You can add new Seminar Attendee Statuses by clicking the Add button in the top right corner. You'll then see the below dialog:
Just type in your new Attendee Status and click Save Seminar Attendee Status. If you had added a new Status for "No Show", you would then see it in your list of Seminar Attendee Statuses, as below:
Seminar Attendee Statuses have both Edit and Delete options beneath them, meaning you can edit their name or delete them entirely.
After adding your Seminar Attendee Status, it will then be available to apply to any Seminar Attendees with which you are working.