While invoicing a group code may be created by pressing [CTRL]+[G]
This enables later creating an invoice with a single code.
Enter 3 codes:
VRAB1
VBORDT
VDIST
Press [CTRL]+[G]

GROUP CODE [NETA]          press Enter key
NAME [My first group code] press Enter key

The group code ".NETA" will be created.
Selecting .NETA while invoicing will add the 3 codes assigned to it.

[F7] Fee schedule

Please look in the demo at the [F7] fee schedule item VRAB1.
To scroll up/down in the fee schedule use Page/Down Page/Up keys.
VRAB1 is a good example of how a code updates the reminder system.

Create a category:
Code:V
Name:Vaccination Category
[F1] to save

Add a code starting with V to be in V category:
Code:VRAB1
Name:Vaccination 1-year rabies
Amount:123.45
Recall: Yes (type 1-60 then press Enter for each vaccination date to update)
[F1] to save

Add credit methods (never typed into invoice, but selected from at end of walkout.)
Codes starting with a minus sign [-] are credits
Code: -CHECK
Name: Check
[F1] to save

Code: -CC
Name: CREDIT CARD
[F1] to save
Code: -CASH
Name: Cash
[F1] to save

While invoicing, pressing ? shows other options.