On the SEARCH page you will see a blue hyperlinked to "Change the Listing Service or Property Class". Depending on the listing service(s) connected to your account, you may find a specific search page for Residential, MultiFamily, Residential Lease, among other search pages to choose from on RealScout.
If you would like to search ALL Property Classes and ALL the MLS/Listing Service/DataFeeds you have access to, choose the Cross-MLS (Basic Criteria) option.
Then click the button Start Searching.