When you log out of one of your Gmail accounts, you unlink both it and the others that are linked to it. You can always switch between the accounts to use each separately. However, when you log out of one, the others are signed off, too. After you unlink an account, you have to log in the next time you need access. You can skip forward and complete these three steps in one swoop by clicking this special logout link. Otherwise, follow these steps: Signing off logs you out of the current account as well as any other Gmail accounts connected to it, meaning that the browser severs its ties to all the currently logged-in accounts. To enable easy Gmail account switching again, log in to both accounts.

How to Remove the Linked Account History

After you sign out of your linked Gmail accounts, you’re given a list of those accounts to make it easier to sign back in. You can delete accounts from this list if you like.