How can I add slider image?

Hi there,

Thanks for using Poseidon.

The theme uses the featured images of your posts, and only display the default image if the featured image is missing.

Please see this tutorial how to add featured images: https://themezee.com/docs/featured-images/

We also have a setup guide for the whole slideshow on https://themezee.com/docs/post-slider/

Best,
Thomas