Developed the Arrange feature for the ComfyUI_frontend repository, enabling users to reposition selected nodes within the multi-select toolbox into vertical, horizontal, or grid layouts with a live spacing slider. The implementation used JavaScript and Vue.js, focusing on UI/UX design and front end development. The feature introduced an ArrangeButton in the interface, anchored layout calculations to the smallest node position, and provided rAF-throttled live previews for responsive feedback. Undo functionality was streamlined by committing changes as a single entry. Comprehensive unit tests were written for both arrangement logic and session behavior, ensuring reliable and consistent layout adjustments during user interactions.