Featured Image shown twice

Hi there,

Can you link me to a page where it's showing twice?

http://www.androidicecreamsandwich.de/aics-top-10-der-kw-422015-423592/

Ah, this is because you've added the image into the single post as well.

If you'd like to keep the image in the single post, you can remove the featured image with this CSS:

.single .page-header-image-single {
    display: none;
}

where i have to insert the css?

This should help: https://generatepress.com/knowledgebase/adding-css/

Thank you

You're welcome :)