Invoice template, how to change the text under "Notes" and "Terms and Conditions"

Invoice template, how to change the text under "Notes" and "Terms and Conditions"

In "Invoice templates", there are two text/info sections at the bottom:"Notes" and "Terms and Conditions". It is possible to change the names of these two headings, but how is it possible to change/alter the text under it.

As a standard it says "Thank you for your business" under Notes - I need to change it into something different- How?

Thank you.