Zenoti provides more than one way to open the POS window based on whether you are collecting payment for an existing appointment or directly generating an invoice without creating an appointment from scratch.
Based on your requirement, refer to the following articles:
Although you can launch the POS window directly (without an appointment), Zenoti recommends that you first book an appointment and then launch the POS window to collect payment, so that the corresponding data is recorded and there is no overlap between the service providers’ time.
You can open the POS window directly (without an appointment), if:
You are selling a product, membership, prepaid card, or gift card
You have many walk-in guests and do not have the time to create appointments from scratch