Title & Date On Featured Image

On the demo of the Cubic theme when you click the post about “The Lake” you will see the title “The Lake” and the date in a small transparent, grey box on the top of the featured image. When I try to do this, the post title and the date show up beneath the image, not on it.

Does anyone have any solutions to this problem? I am struggling to find where you can set the default or settings so that the post title and date show up on top of and at the top of the featured image.

Thank you!