When you've created your contact list, then you are able to add contacts or leads manually to your list. To learn how to create a contact list, access the tutorial here: How to Create a Contact List?
If you already have a contact list created, then you can begin with the instructions below:
1. Select the "Add Contacts" button.
2. Then select "Add Manually".
3. Enter the contact or lead email. One contact per line or by copying and pasting your list.
4. Select on the "Submit" button.
5. After the list has been imported, then select the "Close and Reload" button.
6. To edit a contact, select on the edit icon for the specific contact.
7. To view the contact, select the view icon next to the contact.
8. To delete contacts, select the contacts which you want to delete by selecting the checkbox.
9. Select "Actions" and click the delete option.