How do you change the default font of comments (whether inline or bubble) in Microsoft Word 2007?
Press Ctrl+Alt+Shift+S to bring up the Styles window. Click Manage Styles (third button at the very bottom of the window).
Edit the font settings for the entries below (for easy browsing, sort them alphabetically). For each, make sure that New documents based on this template is selected (near the bottom of the window).