First you need to edit the post or page where you want to credit multiple authors.
On the post edit screen, you will notice the new ‘Authors’ box on the right sidebar.
By default, it will show the original author of the post. You can add additional authors by clicking on the drop down menu and selecting the one of your choice. Or you can search for it using the search bar at the top of the list. The plugin will start showing authors as you type.
The selected author name will now appear below the original author name.
You can continue adding more authors as needed. Once you are done, you can rearrange the order of the author list just by a simply drag and drop.
Save or publish your post for the changes to take effect.