To export an entire list:
Go to "Lists", in the left panel on your dashboard.
Hover over the list you wish to export and click on the 3 dot menu icon. Next, select the "Export List" option.
Alternatively, click on the list you wish to export.
From within a list, you can either click "Export" to export an entire list, or select individual contacts to export.
Export a single contact:
From within a list, click the 3 dot menu, and select "Export Contact".