THPDFHeadlessDocument.SetRichTextFieldValueWithFamilies

procedure SetRichTextFieldValueWithFamilies(FieldIndex: Integer;
  const Runs: THPDFHeadlessRichTextRuns;
  const Families: THPDFHeadlessRichTextFontFamilies;
  const Options: THPDFHeadlessTextAppearanceOptions);

Regenerate every widget appearance transactionally with the selected family fonts, updating V, canonical RV and the RichText flag together

The existing read-only, maximum-length, password, comb, file-select, encryption, authenticated signature and field-lock policies all apply; failures leave the loaded field graph untouched

Use SaveToFile to publish the prepared graph to an independent destination; the source stays read-only

Named family behaviour · Document API