Thanks for quick response. That is what I meant. How do you actually alter the font afterwards (or use a template chart for that matter ?!) Bit of an xl novice Im afraid, so really appreciate the help.
Right-click whichever bit of the chart you want to format, then Format whatever and change font. Exact steps depend on version of Excel.
If you format the chart itself the font changes should apply to the whole thing.
For defaults, you need to create a chart formatted the way you want then define it as a template in the Chart Wizard.