Properties are automatically sorted alphabetically in the Properties and Calendar pages. There is the exception for new properties (i.e. added within the last 5 days) as they'll always be displayed at the top.

It is not possible to manually change the order of properties in these pages.

You can add your vote to the feature request here if you would like to see this option.

Are you looking to change the order in which your properties appear on the homepage of your Direct site? You can do that following the steps here.