The test file at https://github.com/mozilla/pdf.js/blob/master/test/pdfs/annotation-choice-widget.pdf contains listboxes, which are not rendered correctly when printed right now. These kinds of fields are made by https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L672-L678.

/cc @calixteman 
constructor(document, calculationOrder, objects) {
    this._document = document;
    this._calculationOrder = calculationOrder;
    this._objects = objects;
    this._document.obj._eventDispatcher = this;
  }
  mergeChange(event) {
    let value = event.value;
    if (typeof value !== "string") {
      value = value.toString();
    }
    const prefix =
      event.selStart >= 0 ? value.substring(0, event.selStart) : "";
    const postfix =
      event.selEnd >= 0 && event.selEnd <= value.length
        ? value.substring(event.selEnd)
        : "";
    return `${prefix}${event.change}${postfix}`;
  }
  dispatch(baseEvent) {