Electrum Wallet - Is it possible to specify inputs in new transaction? In my wallet, I have bitcoins belonging to three different addresses.  I want to send the bitcoins from one of those addresses elsewhere.

This is made easier, perhaps, by the fact that the balance of that one address arrived in a single transaction.

Is there any way for me to do this?

Thanks!
Use the secondary click on a address and then the "Send from" option.