Math equations & Mermaid diagrams

Turn them on

Both are one toggle away — and off by default to keep the editor light:

1. Open Settings (gear icon).
2. Under Writing tools, switch on Math (LaTeX) and/or Diagrams (Mermaid).

Write math with KaTeX

• Inline math: wrap it in single dollars — $e = mc^2$
• Block math: wrap it in double dollars:

$$
\int_0^\infty e^{-x^2} dx = \frac{\sqrt{\pi}}{2}
$$

The preview renders it instantly — no internet needed, KaTeX ships inside the app.

Draw diagrams with Mermaid

Use a fenced code block with the mermaid language tag:

```mermaid
graph TD
  A[Idea] --> B{Good?}
  B -->|yes| C[Write it]
  B -->|no| D[Coffee first]
```

• Flowcharts, sequence diagrams, pie charts, and everything else Mermaid supports.
• Diagrams render in the preview and in HTML exports.

Performance tip: both engines load only when you enable them, so leaving them off keeps startup instant.