My favorite contacts used to be listed to the left in the inbox, and mailing was a one-step process. Now, to mail a contact I click on gmail, then contacts, and a new window opens. Then to compose, another window has to open.
Gmail – How to get contacts back into the inbox
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Best Answer
Google is promoting Hangouts, which is now their default settings. You can always revert to the older layout. Look at the bottom left corner of your browser and click on the "Revert to the old chat" link
This will take you to your familiar layout: