- Visit redbeltgym.com.
- Sign in to your account.
- Click Setup in the left-side menu.
- Under Contacts & contracts, click Customizations.

- Make sure the Custom fields tab is selected, then click Create custom field.

- Enter a Field name, such as "T-Shirt Size". The Field alias fills in automatically.
- Choose a Field type:
- Text: a short answer.
- Email: checked as an email address.
- Number: digits only.
- Textarea: a longer answer over several lines.
- Optional: enter a Default value. It's filled in for new contacts.
- Click Save, or click Save & new to save the field and start another one.

The new field shows on every contact's profile.