By default the built-in "Organization" contact field in VolunteerMatters is a simple free-text field. There also exists additional functionality that allows you choose to have a managed list of organizations for a volunteer or administrator to search and select from when populating this field. Either from the registration form, their profile, or the contact record.
Furthermore, the field can support a write-in option if desired. This write-in option allows the entry of a value not in the predefined list. The custom entry will be saved with the contact record but will not be added to the list of predefined choices for other volunteers and/or administrators. This supports large lists, search, and the ability to write-in all in the same free-text field.
The following screenshots show the various options of the field:
Volunteer or Administrator Selecting from the Predefined List
Volunteer or Administrator Searching the Predefined List
Volunteer or Administrator Writing In Their Own Entry
And Saved on the Record