Choosing default streaming data source

[Casey]

I have multiple data sources set up, all of which allow streaming data.  I see how to select default source for backfill, but how can I select default for streaming?  Thanks.

[Jerry Medved]

streaming sources need to be selected explicitly on each window.  If bringing up new portfolio, it will use the last used one. 

for windows other than portfolio (Level II, etc) you can configure one, then right click on the caption and select the option to set as default