Using lower resolution/size images for thumbnails on posts index
You will have to edit your theme files for that, but you can use the_post_thumbnail (Codex) to show the featured image in a smaller size. This is an example from the Codex which you can probably use 1 to 1: <?php if ( has_post_thumbnail() ) : ?> <a href=”https://wordpress.stackexchange.com/questions/189741/<?php the_permalink(); ?>” title=”<?php the_title_attribute(); ?>”> <?php … Read more