> For the complete documentation index, see [llms.txt](https://www.center.daxium-air.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.center.daxium-air.com/user-documentation/build/building-forms/fields.md).

# Fields

Fields are the building blocks of your forms. Daxium-Air offers a wide range of field types to capture any kind of data.

**Presentation fields** display static content to all users on every submission — titles, text blocks and logos. Covered in [Simple Fields](/user-documentation/build/building-forms/fields/simple-fields.md).

**Data fields** capture user input: text, numbers, dates, durations, locations, emails, phone numbers, photos, files, signatures and list selections. Also covered in [Simple Fields](/user-documentation/build/building-forms/fields/simple-fields.md).

**Formulas** are calculated fields that derive a value from other fields using JavaScript. See [Formulas](/user-documentation/build/building-forms/fields/formulas.md).

**Relations** link submissions across forms, enabling parent-child structures and sub-forms. See [Relations](/user-documentation/build/building-forms/fields/relations.md).

**Field options** add extra behaviors to individual fields — pre-filling, advanced search and OCR recognition. See [Field Options](/user-documentation/build/building-forms/field-options.md).


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