WordPress.org

What is root cookie path support?

This is the basic functionality of the plugin, it removes the path from the cookie. e.g cookie set as http://www.domain.com/wordpress becomes http://www.doamin.com

How to I enable root cookie path support?

You don't need to, by default the path is removed from the cookie just by enabling it

What is root cookie subdomain support?

This is new as of version 1.5, root cookie can now change the wordpress cookie to be accesiable across subdomains. e.g. cookie set as http://www.domain.com becomains domain.com

How to I enable root cookie subdomain support?

In the wordpress administrator dashboard, select root cookie and tick the box!

How do I manually set the domain / subdomain of the cookie?

In the wordpress administrator dashboard, select root cookie and unselect "Allow Cookies to go across All Subdomains" and in the "Domain Name" box type in you domain such as domain.com or domain.co.uk

root cookie subdomains doesn't work for me!

Try maunally setting the cookie, see above.