That did open up the default setting so I can change it to another account unfortunately the account I want to use doesn't have a notes button in that account. At the bottom of the account there is a statement saying that only the main account can be used for notes. A little background we set up a second ICloud account for both of us to share for our calendar, contacts and notes. Worked great until we did the update to 10. The 2 Iphones and the IPad Pro updated without a problem keeping the second ICloud account as the default just the older IPad didn't for notes but the contacts and calendar did. Confusing.
thanks
Walter