VSCode Markdown ALL in One使用

https://github.com/yzhang-gh/vscode-markdown#keyboard-shortcuts-1

Markdown All in One: Create Table of Contents
Markdown All in One: Update Table of Contents
Markdown All in One: Add/Update section numbers
Markdown All in One: Remove section numbers
Markdown All in One: Toggle code span
Markdown All in One: Toggle code block
Markdown All in One: Print current document to HTML
Markdown All in One: Print documents to HTML
Markdown All in One: Toggle math environment
Markdown All in One: Toggle list
It will cycle through list markers (-, *, +, 1. and 1))

$$
f(x)=\int_{-\infty}^{\infty}
    \hat f(\xi)\,e^{2 \pi i \xi x}
    \,d\xi
$$

$$a$$  
$a$
$b$
$x$
$\isin$

|  哒哒 | 哒哒 |
|---|---|
| 哒哒  | 哒哒  |

| 哒哒 | 哒哒 |
| ---- | ---- |
| 哒哒 | 哒哒 |