Hi there,
you can use this PHP Snippet to convert the themes Next Post link to a button:
function filter_single_post_navigation($output, $format, $link, $post){
// display post title
// $title = get_the_title($post);
$title = __( 'Next Post', 'generatepresss' );
$url = get_permalink($post->ID);
$class = 'button next-post';
$rel = 'next';
return "<a href='$url' rel='$rel' class='$class'>$title</a>";
}
add_filter( 'next_post_link', 'filter_single_post_navigation', 10, 4);
You can use this CSS to force it to fill the space available:
.button.next-post {
width: 100%;
text-align: center;
}