You can enter multiple bills consecutively without saving and closing the Bill window, and I'm here to show you how.
Clicking the Save button will only save the current bill details for that specific window, and If you make changes to that current bill, it won't be saved. To fix this, you'll need to click Save and New instead.
Here's how:
Click the +New button and select Bill.
Enter the necessary information.
Click the dropdown button beside Save and Close.
Click Save and new.
This way, the window will not close and will create a new bill template.