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OpenVPMS is developed with the help of various tools including the Java profiler 
Thanks to our sponsors:
OpenVPMS is developed with the help of various tools including the Java profiler
Re: Apply an overrall discount on an invoice
David,
While we are happy to keep answering questions most if not all are answered in the help documents provided right here.
https://openvpms.org/documentation/csh/2.1/
It's a good idea to check these out via a simple search before you ask because it will solve your questions a lot faster.
For discounts the section is
https://openvpms.org/documentation/csh/2.1/concepts/discounts
Thats what is currently supported.