code: function slide9() {
  		var intWgap = 4.25;
  		var opts_lineDataSymbol = ['circle','dash','diamond','dot','none','square','triangle'];
  		var slide = pptx.addNewSlide();
  		slide.addNotes('API Docs: https://gitbrent.github.io/PptxGenJS/docs/api-charts.html');
  		slide.addTable( [ [{ text:'Chart Examples: Line Chart: lineDataSymbol option test', options:gOptsTextL },gOptsTextR] ], gOptsTabOpts );
  
  		opts_lineDataSymbol.forEach(function(opt,idx){
  			slide.addChart(
  				pptx.charts.LINE,
  				arrDataLineStat,
  				{
  					x:(idx < 3 ? idx*intWgap : (idx < 6 ? (idx-3)*intWgap : (idx-6)*intWgap)), y:(idx < 3 ? 0.5 : (idx < 6 ? 2.75 : 5)),
  					w:4.25, h:2.25,
  					lineDataSymbol:opt, title:opt, showTitle:true,
  					lineDataSymbolSize:(idx==5 ? 9 : (idx==6 ? 12 : null))
  				}
  			);
  		});
  	}
docs: SLIDE 9: Line Chart: TEST: `lineDataSymbol` + `lineDataSymbolSize` ------------------