Hi doublest,
Thanks for contributing to our forum. We do not currently offer any functionality that would allow you to change the font sized used for the notes to buyer which can be included on your Auctiva packing slips, but we have made note of this idea as something to consider when planning future site updates.
If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the “Help” tab and selecting the “File Support Case” option.
-Mike