You can also bulk select a list of contacts to archive at once - Contacts - Archive Selected
Step 1: Navigate to Contacts and select All Contacts
Step 2: Choose a Contact you wish to Archive
Step 3: Archive Contact
The contact is now archived and in the Archived field.
Step 1: Choose Contact to restore
To restore an archived Contact navigate to archived contacts and select the Contact you wish to restore.
Step 2: Restore Contact
Your Contact is now restored and back in your All Contacts list.