docs: private void printGrid(PDPageContentStream pcs, float offsetX , float offsetY,
  						   int numRows, int numCols , float sizeBox ) throws IOException {
  		float pageWidth = (float)paper.convertWidth(units)*UNIT_TO_POINTS;
  		float pageHeight = (float)paper.convertHeight(units)*UNIT_TO_POINTS;
  
  //		pcs.setLineCapStyle(1);
  		pcs.setStrokingColor(0.75);
  
  		for (int i = 0; i <= numCols; i++) {
  			float x = offsetX + i*sizeBox;
  			pcs.moveTo(x,0);
  			pcs.lineTo(x,pageHeight);
  		}
  		for (int i = 0; i <= numRows; i++) {
  			float y = offsetY + i*sizeBox;
  			pcs.moveTo(0,y);
  			pcs.lineTo(pageWidth,y);
  		}
  		pcs.closeAndStroke();
  	}