If you're referring to adding a new team member, I can gladly show you how to do that. Follow these steps below:
From the left menu, select Team under Your Practice.
Select Add user, then fill up the fields accordingly.
Select Next, then choose the level of access for this member
Select Next, then select which client this member can access.
Select Save and close.
Once, completed, you've successfully added a new team member. Also, check out this link as it has a lot of helpful information about members and how to manage them.