ArcGIS: Dark Background Using Dataframe Properties

I'm liking the darker map theme templates on the ESRI Blog. I realise we can't use this for the corporate web map services but it is very easy on the eyes when I'm digitising infrastructure assets. I think I'll make this a permament workspace for asset registration.

My boss also reminded me that I can set the workspace background to black via Dataframe Properties.

arcgis, workflow, dataframe properties, layers, themes