The login account can be shown in the application in the left hand menu. Unfortunately, the Google account picture is not shown. Options to switch notes account is missing as well.
#wish list: show Google account picture next to mail address (instead of current icon as shown in the screenshot)
#wish list: show first name last name instead of mail address, the mail address only on mouse-over
#wish list: offer feature to switch account
#wish list: offer the feature to go to your Google account settings
#wish list: on large screens, show the Google Account picture in the right top corner.