# Heading 1…up to ######
**bold** *italic* ~~strike~~emphasis
[text](https://url)link
image
`code`inline code
```js … ```code block with language
- item / 1. itemlists
- [ ] todo / - [x] donetask list
> quoteblockquote
> [!NOTE] / [!TIP] / [!WARNING]alerts
| a | b |table (with | --- | --- |)
---horizontal rule
$x^2$ / $$ … $$math (KaTeX)
```mermaid … ```diagram (Mermaid)
text[^1] … [^1]: notefootnote
[[toc]]table of contents
:rocket:emoji shortcode
<details><summary>…collapsible section
Shortcuts
Bold / ItalicCtrl+B / I
Link / CodeCtrl+K / E
Heading (cycle level)Ctrl+H
Open file / Download .mdCtrl+O / S
Cycle layoutCtrl+\
Toggle outlineCtrl+Shift+O
Indent / outdent selectionTab / Shift+Tab
Print / PDFCtrl+P
Markdown syntax guide →