To see wide Map on your Home page you need to choose that page as front-page in Settings/Reading tab. Supermap add-on should be activated. That page will use front-page.php template which you can customize in your child theme if you need. Such template can be set up only on one page - Home page. If you need supermap on some other page you can use shortcode [supermap].
In Appearance/Customize tab exist special tab to set up this Supermap - Supermap settings. There you can set up Height,Number of Properties to show, hide sidebar option and also custom query to set up some additional filters using property attributes.