When you receive an invoice payment or part payment right click onto the booking strip and select 'Take Invoice Payment' to produce the invoice payment dialog. Adjust the amount if the payment is a 'Part Payment' - click 'OK'

The 'Tender' dialog will appear - nominate the type of payment (cash, cheque etc.) and click ok. Your done!

Part Payments: Repeat this process as part payments are received.

Note: Take a look at the 'Transaction summary' to view the result of your processing.