RepairDesk enables you to mark multiple unpaid invoices as paid all within one window.
All you have to do is to first select unpaid invoices for which you want to add a payment.
Now click on "Mark As Paid" under Action button.
A pop us screen will open where you can add payment information such as payment method, date and notes.
Once you've entered the relevant information, click on Save to add payment against selected invoices.