I don't use Coin Control but I do want to learn more of the inner workings of client and can see myself needing to use more advanced features. I want to determine which address is used for senders address, we already have deterministic features so we can have different receiving addresses. It would be nice to know how to properly use this so I can select which address for senders address.

When I open coin control in Armory all I see are 3 addresses with the funds in from my wallet. I thought I could actually select the sending address, maybe this is not supported at all and all is meant by selecting source if where the funds are...I don't see why this wouldn't be possible because new addresses are automatically created when sending Bitcoin using auto transaction features. I just want to be specific as to which address I use to send Bitcoin from. It is helpful not only for privacy but also when someone is expected Bitcoin from a specific address without me having to chase it up and explain to them it came from another address.

Instead the only option I see are the last 3 addresses that were generated/used by Armory. Is this all I have to choose from?