improve readme

README.md

@@ -5,6 +5,17 @@ An Obsidian plugin that allows adding iframes with custom styling as editor tabs
 
 ![A screenshot of the plugin's settings](settings.png)
 
+## Usage
 To use this plugin, simply go into its settings and add a new frame, either from a preset shipped with the plugin, or a custom one that you can edit yourself. Each frame's tab can be opened using the 'Custom Frames: Open' command.
 
 Note that this plugin only works on Desktop right now.
+
+## Presets
+By default, Custom Frames comes with a few presets that allow you to get new tabs for popular sites up and running quickly.
+- Google Keep, optimized for a narrow side tab
+
+If you create a frame that you think other people would like, don't hesitate to create a pull request with [a new preset](https://github.com/Ellpeck/ObsidianCustomFrames/blob/master/main.ts#L8).
+
+## Roadmap
+- Allow setting a custom icon for each tab
+- Possibly allow executing custom JavaScript in iframes (though security implications still need to be explored)