Gets the justification of the field's variable text (Q): the field's or its nearest ancestor's, else the interactive form's; default left.
public PdfTextJustification Quadding { get; }
ISO 32000-2 §12.7.4.3, Table 228 (inheritable) and §12.7.3, Table 224. A value other than 0, 1 or 2 reads as left with a diagnostic.