Hello, 

To randomize the order of portfolio items displayed in the fullscreen slider:

open showcase-page.php and then change the query that selects the items between lines 43-48

and add a random orderby parameter in the query parameters list

$satelite_args = array(
       'post_type' => 'satelite_portfolio',
       'paged' => $satelite_paged,
       'tax_query' => $satelite_showcase_tax_query,

       'orderby'        => 'rand',

       'posts_per_page' => 1000,
);

Regarding your other ticket we can give you guidelines on how to implement and what are the possible solutions.

The solution we gave was not a widgetized area was just a space where to add your content and you can customize and style it further

This is a short tutorial on how you can add a widgetized area to your footer:

https://code.tutsplus.com/tutorials/dynamically-adding-four-footer-widget-areas--cms-22168

Hello!

Plz contact the author directly regarding the HTML template you bought.

https://themeforest.net/user/clapat

This support forum is dedicated only to WordPress themes and we lack the expertise to help you with HTML templates. You may get a faster answer if you post your question to the template's comments dashboard.