code: public final PageStyleBuilder paperFormat(
  			final PaperFormat paperFormat) {
  		this.paperFormat = paperFormat;
  		this.pageWidth = paperFormat.getWidth();
  		this.pageHeight = paperFormat.getHeight();
  		return this;
  	}
docs: Set the paper format to one of: A3, A4, A5, LETTER, LEGAL, USER
  USER is automatically used if you use
  {@code setPageHeight()} or {@code setPageWidth()}.
  
  @param paperFormat the format of the page
  @return this for fluent style