Hey George,
To add navigation on the single posts, you can add the following code in your child theme’s functions.php:
function x_add_post_navigation() {
if ( is_singular('post') ) {
echo '<div class="navigation-post">';
x_entry_navigation();
echo '</div>';
}
}
add_action('x_after_the_content_end', 'x_add_post_navigation');
This would require custom CSS as this is not a theme feature by default and is outside of our support scope, but we will do our best to help you getting started with the customization but we will not be able to implement it. To center align the content on single posts, you can add the following code in the Theme Options > CSS:
.single .entry-content {
text-align: center;
}
The code is correct, this will hide the featured image on all the single posts only. Currently you only have 3 posts, try adding another and it will work on others as well.
Please note that the code provided above serves as a guide only and is to help you in getting started so implementing it and maintaining the code will be out of our support scope and for further maintenance for new possible versions of the theme that may cause the customization to break, you will need to hire a developer.
Here are some related links for further reading, this could help you in finding and implementing some CSS fixes:
Thank you for understanding!