cell2.setCellValue("C3");
Comment comment2 = drawing.createCellComment(anchor);
RichTextString str2 = factory.createRichTextString("XSSF can set cell comments");
//apply custom font to the text in the comment
Font font = wb.createFont();
font.setFontName("Arial");
font.setFontHeightInPoints((short)14);
font.setBoldweight(Font.BOLDWEIGHT_BOLD);
font.setColor(IndexedColors.RED.getIndex());
str2.applyFont(font);