Etienne Doumazane enhanced the napari/napari repository by refining the image attenuation slider in the user interface, focusing on improving user control and analytical precision. He adjusted the slider’s range to 0–0.5 and increased its decimal precision to three places, ensuring the displayed value now directly reflects the actual attenuation without a previous multiplication factor. This Python-based front-end and GUI development work addressed reproducibility and accuracy in image analysis workflows. While the contribution was limited to a single feature over one month, the targeted changes demonstrated careful attention to user experience and commit-level traceability, resulting in a more transparent interface.