Please add the code below to Customizer > Additional CSS

 

Here is a guide how to add custom css: How to add custom CSS / PHP code or modify the theme code

 

1. If you wish to hide the featured image of a project post in single view



Please add this code in the Additional CSS field:


.post-article .post-media .media-inner img, .portfolio-image-wrapper img {
    display: none;
}



 




2. Or you can simply decrease the Featured image size in a single project view:


Please add this code in the Additional CSS field:


.post-article .post-media .media-inner img, .portfolio-image-wrapper img {
    width: 800px;
}


Adjust the width number according to your image size.