To add an ID to content within the post body (RTF) in Webflow for easy.external linking, you can follow these steps:
1. Open the page where you want to add the ID to the content within the post body.
2. Select the Rich Text element that contains the content you want to link to.
3. In the properties panel on the right-hand side, scroll down to the "Settings" section.
4. Click on the "ID" field and enter a unique ID name. Make sure to use a descriptive name that relates to the content within the Rich Text element.
5. Press Enter or click outside of the field to apply the ID to the element.
By adding an ID to the content within the Rich Text element, you can now create external links that directly point to that specific content within the post body. To create an external link to the ID, you will need to follow this structure:
```
https://www.example.com/page#ID
```
Replace "https://www.example.com/page" with the actual URL of the page you want to link to, and replace "ID" with the ID name you assigned to the content within the Rich Text element.
Once you've created the external link, when users click on it, the page will scroll automatically to the content with the specified ID. This can be helpful for linking to specific sections or points of interest within a longer post body, making it easier for users to navigate directly to specific information.