If you'd like to add a new staff member go to your Settings tab on the left side menu.
Under the settings click on the Staff heading. This will bring up your staff settings.
Scroll to the bottom of the page and click on the "Add new staff member" button.
A new window will pop up where you can add the information for the new staff member. The lines with the asterisks * next to them are required, the rest is optional to fill in. Hit the "save" button at the bottom of the page.