You can add 'Store Credits' as a product in BackOffice > Products > Add Product.
In this example, we'll be making this Store Credit dummy product FREE (so use this only for giving Store Credits to people you like!)
Save and then add this dummy product to your iPad Layout for easier access later when using the iPad Register.
When you want to give your special customers FREE Store Credits, make sure you tap it to add this product into the transaction before you check out.
As per the screenshot below, here's how to add Store Credits manually:
Remember to drag the item to your iPad Layout:
If you want to charge for the Store Credits, you can price it as RM1 so that when the customer pays RM500 to buy Store Credits, you'll get 500 Store Credits.
If you want to give 1000 Store Credits but you only want the customer to pay RM500 to get the 1000 Store Credits, what you can do is make the Store Credits dummy product have Variable pricing.
So instead of making it have a Fixed price of RM0, make the pricing type Variable instead, so that you can always dictate how much you should charge whenever you press the Store Credits dummy product on the iPad.