Update README.md

Author: autumnfjeld

README.md

@@ -2,6 +2,8 @@
 
 Create content models in WP Admin.
 
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 ### Development
 
 * `npm install` to install the dependencies
@@ -12,3 +14,9 @@ Create content models in WP Admin.
 ### Bundling
 
 Run `npm run plugin-zip` to create a zip file of the plugin. It will automatically bundle the JavaScript files.
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+### Usage Hints
+(This is temporary, helpful for internal testing)
+* If rich text area is needed in a data model, a group block can be added in the CPT-template and bound to `post_content` with the speical key `post_content`
+    * <img width="818" alt="image" src="https://github.com/user-attachments/assets/d8bd60ea-858c-42fd-b4f6-7c2295115e08">