William Davis enhanced the ARM64 documentation in the rancher/rancher-docs repository by clarifying guidance for Mixed Architecture deployments. He updated Markdown files and JavaScript-based navigation to explicitly mark Mixed Architecture as experimental, aligning the documentation with current production recommendations. By renaming the sidebar link to rancher-on-arm64-mixed-architecture, William improved discoverability and reduced ambiguity for operators evaluating ARM64 options. His work focused on documentation management and content consistency, ensuring that users could make informed decisions and reducing potential support queries. The changes, delivered through targeted commits, demonstrated a methodical approach to technical writing and documentation structure using Markdown and JavaScript.