1. Edit
Open the Theme screen in the panel and change this file.
A new store
This page was produced by the published theme version of Tenant Test. Content, not code: it lives in the database, it is edited from the panel, and every save is a new version.
2. Preview
A signed link shows the version you saved to you and nobody else.
3. Publish
Publish it when you are happy. If you are not, one click goes back.