In order to be able to send your customers online payment requests, please ensure that 'Online Payments' are enabled. To do this, choose Online Booking > Settings, scroll to Payments and select the Enable Online Payments checkbox.
You can then send a payment request via a Sale
Scroll to the Payments section and click the down arrow next to + Add Payment, then click Request Online Payment
Here, you can either enter the amount that you would like to request, or choose from the pre-set options (blue squares).
You can also enter a message for your customer in to the Details field.
Click + Request Payment to send the request