That is the syntax: the keyword, and showInfo to make the banner visible. Mernyx recognises the family but does not draw it, so the picture is its placeholder.
info showInfo
Expand diagramMermaid Info Diagram Cheat Sheet
Mermaid’s version banner — Mernyx recognises it, but does not draw it yet.
Every picture on this page was drawn by
Mernyx, the native Mermaid editor for macOS. Not by a browser running Mermaid.js — the same renderer the app uses for its canvas.
Expand diagramDraw it in Mernyx.
Open a .mmd file, move a node on the canvas, and the source comes with it. Native on macOS, no browser involved.