The Semantic Canvas plugin for Obsidian enhances the use of canvases by allowing users to visually edit file properties. It enables bulk property updates across multiple markdown files linked within a canvas, as well as the creation of semantic links between notes. The plugin provides intuitive tools for managing properties based on group membership and link relationships. Users can create knowledge graphs, perform mass edits, and even represent diagrams like Venn diagrams or Kanban boards. This plugin facilitates a more interactive and visual approach to working with notes and their properties, making it ideal for organizing complex information and improving note relationships.