Thumbnail only on header

Hi @dagobertocosta,

I hope you are well today and thank you for your question.

Do you want to display the thumbnails only in the slider and not on the posts listed on the blog page?

If yes then you can try achieving this by adding the following CSS code in the Custom CSS option of the latest version of Sparkling theme on the below path.

Admin Area -> Appearance -> Customize -> Sparkling Options -> Other -> Custom CSS

body.blog article img.single-featured.wp-post-image {
    display: none;
}

Best Regards,
Movin