Hi there – if I understand correctly then the theme does this automatically. If there is no featured image then the theme will try to find an image in the blog post and will use that instead. There’s no setting to change this.
But, when I installed the theme two days ago, there was a setting, which I used. Just take a look at my prototype site: https://journeys31.wordpress.com/
I had imported the posts from blogger, which does not have a featured images feature.
Hi Tom – I have replied via email. I think there was some confusion since I didn’t realise you were talking about a self hosted site. I think it would be best if we continue the conversation via email since this forum is for wordpress.com users.