from not shared to shared

hi all,
I am not being able to sort this out: if by a terrible lack of reason i forgo the chance to put the tick in the Make this data source a shared data source while going thru the Report wizard, is it possible to come back to this decision? And if so, how?

I went through all the menus and i did not find anything; i see data sets, i can add new data sets, i can add new data sources if i want, but how do i change my original data source from whatever it is now to shared, that i don't see. Simply stated, my question would be, how do I edit the properties of my current data source,

thanks,
kowalskyTry this? Create a shared datasource, view the datasource in notepad to gather the ID and name, and then change the RDL file in notepad to replace the local datasource with the shared datasource.