Mark Documentation — Complete Markdown Guide

1. Headings (Titles) Ctrl+1 / 2 / 3

Mark supports all 6 heading levels. When text is selected, pressing Ctrl+1, Ctrl+2, or Ctrl+3 instantly wraps the line with the corresponding heading level.

# Heading 1
## Heading 2
### Heading 3
#### Heading 4
##### Heading 5
###### Heading 6

2. Text Emphasis Ctrl+B • Ctrl+I • Ctrl+U

Format text with bold, italic, bold-italic, and underline tags.

**bold text**            
*italic text*            
***bold and italic***
<u>underlined text</u>     

3. Links (Hyperlinks) Ctrl+L

Create standard hyperlinks. External links automatically open in your system's default web browser.

[Link Description](https://example.com)

4. Images & PDF Sizing Tags Ctrl+Shift+V (Paste)

Standard images default to 70% width. When exporting to PDF, you can specify exact size scaling tags in the description:

![Standard Image](images/photo.jpg)


![Description[small]](images/photo.jpg)   → 25% width
![Description[medium]](images/photo.jpg)  → 50% width
![Description[large]](images/photo.jpg)   → 75% width
![Description[full]](images/photo.jpg)    → 100% width

Clipboard Paste: Press Ctrl+Shift+V to paste an image directly from your clipboard. Mark automatically saves it to the local images/ folder and inserts the Markdown tag. Press Ctrl+Shift+I to insert from a file dialog.

5. Lists & Interactive Task Lists

Create bulleted, numbered, and interactive checkbox task lists. Checkboxes in the live preview are interactive: checking a box in the preview immediately updates your Markdown source.

* Item 1
* Item 2
- Alternative item


1. First step
2. Second step


- [x] Completed task
- [-] Blocked / Incomplete task
- [ ] Task to do


> - [x] Quoted task
> - [ ] Quoted pending task

6. Blockquotes

Format quotes and nested citations with the > character.

> This is a blockquote.
> It can span multiple lines.

> Outer quote
>> Nested quote inside

7. Code & Syntax Highlighting Ctrl+H

Write inline code or multi-line blocks with language identifiers. Features Highlight.js syntax highlighting and instant click-to-copy in the preview.

Use `inline code` within regular text.

```javascript
function greet(name) {
  console.log("Hello, " + name + "!");
}
```

Supported Languages: javascript, python, c, cpp, java, typescript, rust, go, ruby, php, csharp, swift, kotlin, r, bash, powershell, sql, html, css, json, yaml, markdown, latex, and more.

8. Tables

Standard GitHub Flavored Markdown tables with column alignments.

| Header 1 | Header 2 | Header 3 |
| :---     | :---:    | ---:     |
| Left     | Center   | Right    |
| Cell A   | Cell B   | Cell C   |

9. Horizontal Rule

Create visual divider lines between sections.

---
***

10. Mathematical Formulas (KaTeX)

Render mathematical notation natively using LaTeX syntax. Inline math uses $...$ and block display equations use $$...$$.

Inline formula: $E = mc^2$

Display equation:
$$
\int_{0}^{\infty} e^{-x^2} dx = \frac{\sqrt{\pi}}{2}
$$

11. Mermaid Diagrams

Render flowcharts, sequence diagrams, class models, and state diagrams directly inside ```mermaid code blocks.

```mermaid
graph TD
    A[Start] --> B{Decision}
    B -->|Yes| C[Action 1]
    B -->|No| D[Action 2]
    C --> E[End]
    D --> E
```

12. External Code Include

Embed source code directly from external project files without copying and pasting. Supports whole files or line range slices.

!(Main File)[src/main.c]


!(Main Function)[src/main.c#L10-L40]
!(Alternative Syntax)[src/main.c:10-40]

13. Table of Contents (for PDF)

Insert  as the very first line of your Markdown file. When exporting to PDF (Ctrl+E), Mark generates an automated initial page with a linked table of contents.

<!-- TOC -->

# Chapter 1: Introduction
## Background
# Chapter 2: Implementation

14. Smart Auto-Closing & Formatting

Mark automatically closes matching bracket and quote pairs:

Auto-closed pairs: ( ) [ ] { } " " ` `

- Tab: Skips over the closing character when the cursor is positioned directly before it.
- Enter: In any list, pressing Enter creates the next list item. Pressing Enter on an empty item exits the list.

15. Document Import Engine Ctrl+I

Mark can parse and convert the following file formats into clean Markdown:

PDF (.pdf)
Microsoft Word (.docx)
Microsoft PowerPoint (.pptx)
Microsoft Excel (.xlsx)
HTML Documents (.html)

16. Keyboard Shortcuts Reference

All core shortcuts available in Mark for rapid writing:

Shortcut	Action
`Ctrl + S`	Save file
`Ctrl + N`	New file (with unsaved changes prompt)
`Ctrl + O`	Open single file
`Ctrl + Shift + O`	Open folder (loads directory tree)
`Ctrl + E`	Export as PDF
`Ctrl + I`	Import document (PDF, Word, Excel, PPTX, HTML)
`Ctrl + F`	Find & search in document
`Ctrl + M`	Toggle Dark / Light Mode
`Ctrl + R`	Toggle Explorer sidebar
`Ctrl + B`	Bold text
`Ctrl + I`	Italic text
`Ctrl + U`	Underline text
`Ctrl + 1 / 2 / 3`	Heading 1 / 2 / 3
`Ctrl + H`	Insert code / Code block
`Ctrl + L`	Insert link template
`Ctrl + K`	Format Markdown
`Ctrl + Z`	Undo
`Ctrl + Alt + Z`	Undo history panel
`Ctrl + Shift + V`	Paste image from clipboard (auto-saved)
`Ctrl + Shift + I`	Insert image from file picker
`ESC`	Exit Reading Mode / Close search

Documentation & Syntax Guide