Up until now, if you had two or even more Gmail accounts, you had to log out of one account first to access another one. This was in fact true for Google accounts in general, if you had more than one you had to log out first to log in with another identity.
Several workarounds were available available, scripts for instance, the option to use different web browsers, or a web browser's private browsing mode, to access multiple Google accounts at once.
All this has become easier with the recent Google addition of multiple sign-ins. The multiple sign-in option basically allows Google account owners to define multiple Google emails and passwords, so that they can be used to access Google services simultaneously.
Lets take a closer look at how this works, before we detail the things that you need to know about this new multiple login feature.
Visit google.com, or the country top level domain of your choice, and click the Sign In button at the top right. Once you are signed in, click on Settings, and select Google Account Settings from the listing.
Locate the Personal Settings block on the page, and the Multiple Sign-in parameter at the end of it.
A click on change displays a page filled with information about the multiple sign-in feature. Google states that multiple-sign in is an advanced feature, with certain limitations.
It may be required to log out of all accounts once, before the multiple sign-in feature becomes available after making the changes.
Google users should from then on see a drop down next to the email address in the top line on supported Google services. A click on that displays the option to sign in with another Google account, so that it becomes possible to switch between accounts without logging out and in first. (via)
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