How to change font for ALL annotations?

[ormstont]

I've got text annotations being drawn on a chart and they appear fine in the default font on the screen display.

However, I also need my chart to print and the font size appears too large when printed in standard A4.

I set the font on my axes to a smaller size in my printing method but I need to find a way to set all the annotations to a smaller size. There doesn't seem to be any method that allows you to do it. Any suggestions would really be appreciated! Thanks