导出pdf技巧

添加导航窗格

![image1](/img/user/resources/attachments/image1-17 2.png)

![image2](/img/user/resources/attachments/image2-12 2.png)

![image3](/img/user/resources/attachments/image3-6 1.png)

![image4](/img/user/resources/attachments/image4-5 1.png)