Question: How can the address format be changed in saved invoices?

i.e.

Mr. ABC
12345 Diplomat Drive
Stow, New York, 55432

To:

Mr. ABC
12345 Diplomat Drive
55432, Stow
New York

Answer:
It is possible to customize the address format in your invoices by deleting the default variable: \CLIENT_ADDRESS\ from templates and adding the component variables instead, in your preferred order, e.g.:

\CLIENT_STREET1\
\CLIENT_STREET2\
\CLIENT_ZIP\, \CLIENT_CITY\
\CLIENT_COUNTRY\

Alternatively, you can change the default order of the data in \CLIENT_ADDRESS\ by going to "Administrator/Adavnced Settings >> General >> Postal Address Format". Please keep in mind that this will change the order for all users, though.