Load
Insert
Lines
Brand
Mode
Animate Chevrons Debug Centre ports
Export
Advanced options
Layout Line spread
Diamonds
Line order
Compact offsets Line gap Font scale Fold cols X-spacing Y-spacing
Edit map
Click an element to select it.

Starting Python runtime…

First load fetches the WASM runtime (~10 MB); subsequent loads are cached.

## Report a bug

This opens a pre-filled GitHub issue in a new tab with your current map, options, and description. You review and submit it there (a GitHub account and sign-in are required).

What's wrong? required

## Import Nextflow DAG

Paste a Nextflow `-with-dag` Mermaid file to convert it into a starting metro map. Generate one with `nextflow run <pipeline> -preview -with-dag dag.mmd` — see the Nextflow import guide.

Nextflow DAG Mermaid

## Attach a logo

Embeds the image directly into the `%%metro logo:` directive as inline data, so it travels with the map text. The playground runs entirely in your browser and cannot read a logo file from your computer's disk by path.

Image file
This image is large; embedding it will make the map source (and any share link) much bigger. A small logo (under ~50 KB) works best.