Omnibasis builds navigation menu based on your pages. In case you want to an insert a link to your page and not cause a site to reload you need to add CSS class LinkPage to the link on the page.
Lets walk through an example, where the store wants to setup Shop link on the home page.
Step 1. Find a relative link to the page
Navigate to edit page to find a relative link to the page in the field Url as illustrated below.
Step 2. Create a link on the page
Go to a page where you want to insert this link and create a new link or a button.
<p class="lead mt-4"><a class="btn btn-outline-primary LinkPage" href="/shop">Shop</a></p>
Step 3. Add LinkPage class to the link