For every transaction that you make, you can either print out your receipts or email them to your customers. You can also reprint the receipt if you need another copy.
How to Always Print Receipt
First, decide if you'd like to have your receipts printed out automatically for every transaction.
On your Android Register, go to the Hamburger Menu button (3 horizontal lines) > Settings > Printer.
Where it says 'Always Print Receipt', toggle the button ON (it's on if it's orange).
How to Re-print Receipts and Email Receipts
After making a transaction (after checking out), you have the option of printing the receipt or sending the receipt via email (you would need to ask the customer for their email address).
If you have already performed your transaction and need to print/send the receipt, go to the Hamburger Menu button > Transactions.
Look for the intended transaction, then press the ellipsis button (...) and choose to either Print Receipt (re-print) or email the receipt to the customer.