how do I apply the changes I make in one slide regarding presenter notes to ALL of the other slides?
The default text in notes cant be changed as of 6.1
The has to be done page by page:
Use the following keyboard commands to copy the formatting you want and then to paste the formatting to other text.
select the text you want to use then to copy the formatting: option command C
select the text you want to format, then to apply the format: option command V