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PostQueen’s design editor is built on the Polotno SDK. It lets people design an image from templates, text and shapes, or edit an attached image, without leaving the post. It works on images only; video is not edited. The editor needs a Polotno API key, which you buy from Polotno.

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Turn it on

1

Get a Polotno API key

Create an account at polotno.com and create a key in its dashboard. Polotno sets its own terms, and a production key is paid.
2

Set the variable

The web app reads it on every page load, so no rebuild is needed.
3

Recreate the container

Recreate the app container so it reads the new values. A plain docker restart or docker compose restart keeps the old container and its old environment.In the folder that holds docker-compose.yaml, recreate only the postqueen service:
The database, Redis and Temporal keep running. Avoid docker compose down for a settings change: on a host that runs other Compose services in the same project, it stops them too. On Kubernetes, see Kubernetes with Helm.
In the post composer, Design Media opens the editor.

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Where it appears

  • Design Media, beside Insert Media under a post, starts a new design and attaches the result.
  • Selecting an image already attached to a post opens it in the editor. Videos cannot be edited.
Without the key, Design Media still shows on a self-hosted install. Choosing it explains the setup instead of opening the editor: an admin sees “Design Media is not set up on this installation. Add NEXT_PUBLIC_POLOTNO to the server environment and restart PostQueen.” with a link to this page, and other members are asked to contact an admin.
Last modified on September 23, 2026