Google's Multiple Sign-In Feature

I have a couple different Gmail addresses that I use for different purposes. Historically, Google Accounts – including Gmail accounts — have only let people access one account at a time per browser, so using both accounts has been a bit inconvenient. I’ve either had to sign out and sign back in, use a second browser for my second account, or use a Chrome incognito window. And I'm not alone; lots of people have asked us for a better way to use multiple accounts at once in the same browser.

Now, you can visit google.com/accounts and click the link next to "Multiple sign-in." After you sign into your first account, you can sign in with up to two additional accounts from the new accounts menu in the upper right hand corner of Gmail, then easily toggle back and forth between them. You can even open multiple Gmail tabs — one for each of your accounts.

Please keep in mind that this is a feature for advanced users, and there are a couple things to watch out for:

1) Not all Google services support multiple account sign-in yet. For the services that don't support it (like Blogger and Picasa Web Albums), you'll be defaulted to the first account you signed in with during that browser session. So if you click a link from Gmail to Blogger, for example, you'll be logged into Blogger with the first account you signed in with, even if you clicked the link to Blogger from your second Gmail account.

2) They’re still working on making Gmail and Calendar work offline with multiple sign-in. If you rely on offline access, you probably don't want to enable this feature quite yet.

3) Multiple account sign-in only works on desktop browsers for now, so if you use Gmail on your phone's browser you won't see this option yet.

Since Google Apps customers can already sign in to their accounts at the same time as their personal Google Accounts, They won’t be adding this new feature to Google Apps until the new infrastructure is in place. 


Below are the screenshots of certain warnings and infos displayed by Google when i attempted to use the multiple sign feature...

When you check all these options and save your settings, then you should back to your Accounts Home Page and then you can find an option called 'Sign In into Another Account'... And when you click that, you will get the below page ...

And when you sign in this page, you are now using this Multiple Sign In feature ...
Now as said already just find the below option, and select your account... You will find this on top right of the page...

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