Note: much of this section is commented out by default, so make sure that you add your fontdata so that it's not commented out.
注意：这部分大多注释为默认值，所以确定你加入了你的字体数据，这样它就不会被注释了。
2
The guidelines often dictate how to format different types of data or what color and font to use for text.
这些指导原则往往会规定如何设置不同类型数据的格式，或文本应采用哪种颜色和字体。
3
These handlers are called throughout the generation and rendering process and allow modification of report properties, like changing font colors, the data value, and calling external code.