When changing the layout web block in Theme properties, does it affect existing screens?

In OutSystems, when you change the layout web block in the Theme properties, the changes only take effect for newly created screens and do not retroactively impact existing screens that have already been created. This design promotes stability and consistency in applications, allowing developers to customize the user interface without unintentionally altering the appearance of screens that are already deployed and being used.

Existing screens maintain their current layout, ensuring that any designs already in place remain intact. By applying changes only to new screens, developers can experiment and update the theme without risking disruption to current user experiences. This approach emphasizes the importance of managing updates and changes effectively within the development environment.

The other options suggest varying levels of impact on existing screens, which does not align with how the OutSystems platform handles theme changes.