- To make any account the default primary account be sure it is the first account listed under Settings> Accounts> Google.
- If it is not the first account listed you can delete and re-add to make the next account on the list primary.
- If the account you wish to be primary is not the default account you can also change within the Google applications.
- For example, if you select Google Play and then the Menu bar (3 vertical dots) then select 'Accounts' you will be provide a list of your current accounts to select from. This selection will remain the default primary account for THAT application.