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Editing system layouts
Adjust Nuclos system layouts – Dev function block, export to the repository and pull request.
HOW-TO DEVELOPER STAND: JUL 2026 GILT FUER NUCLOS 4.2026.X
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Audience
This article is aimed at Nuclos team members and everyone who wants to contribute to bug fixing/improvements.
Changes to system layouts do not take effect immediately – only a new build of the Nuclos version contains them. Without direct write access, the change is submitted as a pull request to the Nuclos team.
Show system layouts in the editor
System layouts appear in the layout editor when the Dev function block (functionblock.dev=true) is active – via the VM option -Dfunctionblock.dev=true or (from 4.19.1) via a hidden link at the top left of the About page.
Saving / updating
System layouts are not stored in the database and cannot be saved directly. You update them via export in the Nuclos repository under nuclos-server/src/main/resources/resources/layoutml and commit or send a pull request.
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