resize featured image max height

@ritsko The image on a single post or page defaults to showing the image in the original aspect ratio.

You can set it either a 1/1 or 3/4 aspect ratio by editing the Single template in the Site Editor and setting the Post Featured Image block to that block style. You can also set it to a fixed height by adding a value to the “Height” field in the “Dimensions” field group in the right sidebar when you have the block selected.