1. hot key
   1. Tab for subtopic
   2. Enter for topic after
      1. shift+enter for topic before
      2. control+enter for Parent topic
2. insert
   1. 可插入文件，图片，附件等
      1. How to use xmind.png
   2. Web Link
3. save and export
   1. Xmind, 图片，pdf
4. drawback
   1. subtopic结构相对固定，不利于自己设计
   2. 可选中部分，进行风格形式的微调
   3. free positioning可改变topic相对位置，顺序
5. icon
   1. marker: priority and flag
   2. sticker(useless)
6. 逻辑关系
   1. topic and subtopic
   2. 联系与总结
   3. Notes
   4. Create new sheet from topic
7. choose template and theme
   1. Format
      1. style
      2. Map
8. Floating topic and Call-out
   1. No hot key