To help with your office and posting efficiency, you can utilize the Fill Line Item option to help eliminate some of the manual posting.
The Line Items tab will allow you to fill line items:
Clicking on the Fill button on the right side of the screen will populate a pop-up window where you are able to select and apply unallocated money towards multiple appointments. Select the items you would like by clicking on the box to the right. When you are done, just click Apply.