Default template – use of Template Options (Voyage)

First let me say THANK YOU for this awesome theme. I tried many until I found this one.

The only issue I have, and have not been able to figure out how to fix, is the following:

I have posts and the posts are categorized. When I create a page I assigned it to the default template which by default adds a list of the “Categories, Archives, and Tags” on the top-right side of the page. I want to show only a particular category in this page but even if I select which category like is shown in page https://www.voyagebc.com/page-template-and-template-options/ it always shows all the categories.

How can I limit which category and how many posts show in the page?

Thanks,

Leris