Can I show/hide the Navigation (next and previous arrows) in the top of my Details pages?

You can log in to your IDX Broker account, go to Design > Website > Custom CSS and on the Categories or Pages tab, select the Details page and just add this code to show the navigation:

#IDX-detailsTopNav { display: block !important; }

To hide the navigation, the code is:

#IDX-detailsTopNav { display: none !important; }