The account has a dark interface theme. The switch sits in the header next to your profile, and offers three options rather than two.
How it works
- Light and Dark — a fixed choice that stays as you set it.
- System — follows the light or dark setting of your operating system.
- The choice is remembered in the browser, so it is per device rather than per account.
This is purely an interface setting: it has no effect on the structure, the content or the validity of the documents you generate.
Built on the standard in force
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E-Rechnung Pro creates and validates documents against EN 16931:2017 — the version ZUGFeRD 2.x and Factur-X are built on today. We are following the EN 16931-1:2026 revision and will support it as the formats adopt it.