Headings:

# H1, ## H2, ### H3

Emphasis:

**bold**, *italic*, ~~strikethrough~~

Code:

`inline code`

```
code block
```

Lists:

- Item 1
- Item 2

1. Item 1
2. Item 2

Links:

[Link text](URL)

Blockquotes:

> This is a quote

Keyboard Shortcuts:

Ctrl+B = Bold

Ctrl+I = Italic

Ctrl+K = Link

Tip: Select text first, then apply formatting!