Changing the scale for a storyboard

[ColinArrowsmith]

Is there a way to change the scale of the base map to metric (kilometres) instead of miles?  I've had the following response posted:

Hi Colin. The units can be set by the administrator of http://resources.arcgis.com/en/help/arcgisonline/index.html#//010q000000mm000000 Actually could you post that question on: http://forums.arcgis.com/forums/264-Story-Maps so that my colleagues can see it and to confirm that my answer is correct.

Thanks
Colin

[StephenSylvia]

Which app are you using? Are you using a downloadable app or one hosted on ArcGIS.com?

[ColinArrowsmith]

Hi Stephen

I'm using one hosted by the ESRI web site (ArcGIS.com)

Colin