To give someone editorial access to your website, choose “Users” in the sidebar in the Dashboard view of your site:

Then, click the “Add Existing” button at the top of the page:

Finally, enter the email address of the user(s) you’d like to add. And be sure to designate the role you’d like them to have. The different role options determine the level of access the new user will have to your site. Read more about roles here: