It would be fantastic if you could customise the default font, colour etc for a dashboard on a permanent basis.
Currently format font allows you to set the font for a current worksheet, cell, title, but doesn't set defaults for future worksheets or workbooks.
To explain further if you would like your titles to all be black, bold, verdana and 12 point it would automatically happen in all future worksheets or dashboards that you may build.
This would be your own default stylesheet.
--> Community Manager update [Ciara Brennan]
Also refer to duplicate idea #3811