Looking at the "Plan" section of the Encounter screen gives you an overview of the items that are listed on the invoice for that encounter, but often you want a bit more detail.
At the bottom of the "Plan" section is the "Invoice" card, with a button that shows the Invoice number and total:
Click that button to open up the Invoice Details view:
From this view you have access to several features around the invoicing process. The buttons across the top right will let you: turn on the charge-lock (to prevent further invoice changes), view the invoice details in QuickBooks, email the current invoice directly from QuickBooks to your client, and capture a treatment consent form with electronic signature from your client.
On the left side near the top, the checkbox allows you to exclude the appointment charge (automatically pulled from the Appointment Type that you chose during check-in). The button at the bottom will open a menu with payment options, just as you will see on the "Close Encounter" screen.
To close this view, just click anywhere else on the VetBadger screen.