How are private accounts created?
How do I make a copy of a private key?
Private accounts are blind and they do not have a private key. They are virtual.
What is Receipt for? What is the RECEIVE button for?
Transferring assets from one account to a confidential account involves at least 2 steps, the first to transmit the assets and the second to receive them into the confidential account.
More info:
STEP 3: RECEIVING AN ASSET BALANCE TRANSMITTED FROM ANOTHER ACCOUNT