可以使用的工具
- https://www.websequencediagrams.com/
- MY CHOICE: https://mermaidjs.github.io/
- Another choice: google key word:
sequence graph
把 svg 转换成 png 文件
Or without installing anything:
It will produce picture.svg.png that is 1000 pixels wide.
I have tested it only on OS X 10.6.3.