2) Account Control, how does it work?
From the home page, click on the
Account Balance More Info >, then the
Account Control tab. This will let you set up mandatory approval for the account, which essentially means all its out-going transactions must be phased transactions, which means they must be approved according to the rules you set up here.
For example, if you wanted three signatures needed, then add the other two accounts to the whitelist under the second tab, and set the
Number of Accounts to 2. If you wanted two out of three, then set
Number of Accounts to 1. The current accounts signature will always be needed. If that's a problem, you can add a fourth account, set
Number of Accounts to 2, and share the pass phrase for the current account with the other three people.
You really need to understand how phased transactions work first, before using account control.