A user can display posts content on overlays. It is very easy to display post content.

Here some easy steps are given you can display posts content of overlay of featured image.
displaycontentbackend

Step 1 First click on Settings
Step 2 Now in Overlays Settings for ‘Post’ Post Type section paste the place holder in text-area.
Step 3 At the end click on Save Settings button at the button of page.

You can see content on overlays
displaycontentfrontend

Video Tutorial