You can manually add contacts in the App under the "Contacts" drop-down. But you can also import a Comma Separated Value sheet or CSV to bring in a list of contacts (Or to obtain example CSV entries, manually add a contact and Export Contacts to a CSV):
1. Download and fill out the attached contacts.csv template from the bottom of this article.
2. Click Contacts > Import Contacts
3. Select Comma-separated values and click "Next"
4. Click "Browse" and locate your contacts file
5. Click "Open"