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Another way to do this would be to select View -> Show Utility Drawer from the menu bar, and then to select the "Note (Column 1)" style in the bottom half of the drawer that appears.

Hit command-plus on your keyboard until the notes are sized as you'd like.

To make sure that all future documents do this, press the "Edit New Document Template" button in the General pane of preferences, then do the above steps in the window that appears. Save the template, and you should be good to go from here on out.

Hope this helps!