I want to check every order before the time lock on the calendar. How to work?

Open Parameters. On the Payments settings tab, enter the following information:

Post-order screen message fo free orders. Example: 'Your order is waiting for confirmation. Wait for the operator to ring.'

The same message can be entered after making a paid order.

2. Set the Reject pending orders automatically after... checkbox.

3. Specify time - 1 minute.

4. Save it.

As a result, the client will create an order, and in a minute it will be in the Rejected status. The time on the calendar will be free. And you can go to the order and set the desired status.