Make sure you have conducted a property search and have narrowed your search until your screen looks like this

From here, you can hover over any of the properties on the map

Be sure to locate the icon that shows an eye with a little slash through it

Click on this to hide that specific property

Once a property is hidden, you will now see a tab titled "show hidden properties"

​6. Click on this to see which propertie(s) have been hidden

7. To unhide a property, click on that currently hidden property and hover your mouse over it

8. Click on the eye icon on the top right of the property to officially unhide it