- Add content to the post as usual
- After the first paragraph add a Custom Html block
- In that add um_loggedin shortcode in square brackets just like in the image below

4. At the end of the article again add a Custom Html block and add /um_loggedin shortcode
[um_loggedin] Add article content which should be hidden [/um_loggedin]

5. Using these short-codes you can restrict the content only to logged-in users

6. So when the short-codes are added the article content will be hidden to guests they can only access once they sign-up or logs in.