Lets say you have a customer with Momence dollar credits to their name and they'd like to use these credits toward a purchase, then pay the difference with another payment method.
You can do this using the split payment toggle at the bottom right of the POS page.
To begin, start the sale:
select a customer
add the items to the cart
scroll to Payment section
Add the first payment method
toggle on Split Payment
to apply credits, choose Membership
in the 'Amount to be paid' field, enter the dollar figure of credits to use (note: must be equal to or less than the credits available)
Add the second payment method
click 'Add new payment method' (the updated balance will auto-populate the new 'Amount to be paid' field
choose the second payment method
click Add payment method
click Confirm Purchase