Hi Hazel
The "font" button in the numbering just sets the font of the number. From
the Modify Style dialog, Choose Format > Font. That will set the font for
the paragraph as a whole.
By default the Style you set up applies only to the current document. If you
check the "Add to template" box it will be written back to the template
attached to your document - that's probably Normal.dot in your case and if
you want your style to apply to all documents you can write the style back
there. Alternatively set up a new template. To get the style to apply to
existing documents, you'll need to copy it in.
To put a toolbar for a style on a toolbar, use Tools > Customize > Commands.
Select "Styles" from the left hand list and the style you want from the
right. Drag the style to the keyboard.
For more information, start here:
http://word.mvps.org/faqs/customization/CreateATemplatePart1.htm
http://www.shaunakelly.com/word