If you are looking to add a Short Text field to your registration form template, you can do this from the custom fields section. You can create a new registration form or simply edit an existing one.  

To add a custom field with Short Text:

1. Go to 'Registration Forms'

2. Click on the registration form that you wish to edit

3. Go to Section 5 - Other (Custom Fields) tab

4. Click on the '+ Add Field' button

5. In the field type, select the option 'Short Text' from the dropdown list 

Once you have entered the relevant details into the field, click on 'Create Field' to save the changes. You can also mark the field as mandatory if required. 

Below is an example of a short text field. Additionally, if required, you can also add instructions to your field in the 'Statement' box. For example, you can provide a note that your setting only accepts applications from within your local school or catchment area.