Diagram code templates

Nobody remembers the syntax for a language they use twice a year. The template button loads a working example for whichever language you have selected, which you then edit into what you wanted.

It is the quickest route into an unfamiliar language, and it is genuinely how most people should start.

#What this is for

Starting a diagram in a language you do not use often.
Learning a new language by editing a working example.
Getting past the blank page.

#How it works

A grid of Mermaid starter templates with preview thumbnails, including user journey, state, flowchart, sequence, class, entity relationship, gantt, pie, mindmap, quadrant, git graph, XY chart, block a — Each starter carries a thumbnail of what it produces, so you can choose the shape of the diagram before writing any syntax.

Action	How
Load a template	The template option in the editor toolbar.
Per language	The template matches the language you have selected.
Editing	Replace the example content with yours; the structure is already correct.
Replacing your source	Loading a template replaces what is there, so copy anything you want to keep.

#A few things that catch people out

Loading a template replaces the current source. Copy first if you have written anything.
Templates are starting points, not house style. Nothing stops you deleting all of it.
The language reference pages have longer worked examples. See Reference.

Import diagram source from a file

Bringing in source you already have.

Generate diagram code with AI

A draft, written into the code pane.

Text editor

Back to the editor overview.

The source is right there. Read it.