Frontmatter controlsURL copied

You can add frontmatter at the top of any D2 code block:

```d2
---
width: 85vw
height: 70vh
title: Checkout System
layout: elk
theme_id: 3
dark_theme_id: 200
sketch: false
animate_interval: 1200
---
direction: right
...
```

Supported keys in Vyasa:

• width (default: 65vw)
• height (default: auto)
• title (used for fullscreen title + small bottom caption)
• layout (elk or dagre, default: elk)
• theme_id, dark_theme_id
• sketch
• animate_interval or animate-interval
• animate (boolean shorthand)

Animation notes:

• animate_interval enables composition animation.
• If animation is enabled and target is omitted, Vyasa auto-targets all boards (*).