Any means of admin extra custom field please?

Hi! This is the plugin the theme uses for fields, you can read more about how to add more stuff on the plugin page: https://www.ads-software.com/plugins/meta-box/

okay thanks so much I will try tos out right away

Worked like charm straight out of the box thanks a lot ??

one more question please is there a way I could show more related post please? Any suggestion thanks in advance

In functions.php of the theme, look for a related_posts function, and modify this part:

'posts_per_page' => 3

And change that to what you wish.