The Canvas CSS class plugin is a powerful tool that allows you to add custom CSS classes to your Obsidian canvas files. With this plugin, you can easily manage and customize the appearance of your notes and canvases by adding specific CSS styles to individual files or groups of files. The plugin also includes features such as the ability to remove CSS classes, change the appending behavior, and add custom CSS classes to non-opened canvas files. Additionally, it provides settings that allow you to fine-tune the plugin's behavior and customize its appearance.