During March 2025, Johannes Merz enhanced data visualization capabilities in the XENONnT/straxen repository by improving waveform peak visualization for scientific data analysis. He refactored the existing plotting logic in Python to dynamically support multiple peak types, introducing expanded color and style options to make peak interpretation clearer and more consistent. This work focused on maintainability and readability, ensuring that the visualization pipeline could handle diverse waveform data without sacrificing clarity. Leveraging skills in data visualization and scientific computing, Johannes delivered a feature that improved the interpretability of waveform plots, directly supporting more effective analysis within the straxen framework.