Form fields are regular content elements with type: "formField". They render
as interactive AcroForm widgets in PDF and as printable controls in other
formats.
Element shape
Properties
Validation rules
select fields require at least one option.
- Option labels must be unique.
selectionMode and selectedOptions apply only to checkbox fields.
- A single-select checkbox accepts at most one selected option.
- Every selected option must exist in
options.
- Number fields require numeric values; checkbox scalar values must be boolean.
- A select value must be one of its options.
signerRole is rejected on every field type except signature and initials.
Checkbox group
For single-selection radio-style controls, use selectionMode: "single" and
checkboxShape: "circle".
A table cell may contain text, an image, or one form field, but not more than
one of these at the same time.
Global defaults
Use defaults.styles.formField for visual defaults and
defaults.spacing.before.formField / defaults.spacing.after.formField for
vertical spacing. Local style and spacing values take precedence.
Signature and initials fields are AcroForm widgets, not cryptographic or
PAdES signatures.