Send Instant MessagesGmail includes Google Hangouts, a built-in chat gadget that you can use to send and receive instant messages with your colleagues. You can also chat with anyone outside of your domain who uses Google +.
Want to hear and see the person you're chatting with? Just install the voice and video chat plugin to start having real conversations right in your Gmail window (see instructions below).
To open the Chat gadget:Click on the speech marks at the bottom of your Gmail navigation, shown below
To find a coworker with the Chat gadget:The Google Talk gadget shows a list of people you've recently communicated with. You can also find a coworker by starting to type his or her name or email address in the Search, add, or invite field. For example:
To start a chat:
Simply point to a user in the list or search results, and then click (or, if you haven’t yet chatted with the user, click Invite to Chat):
Note: A green line appears underneath a contact's image when they are online.
To chat outside of your Mail window:If you're chatting with someone, you can click the Pop-out arrow to use the Chat gadget outside of your Gmail window:
To set up chat options:
If you’ll be using voice and video chat...
In your Gmail window, click Settings in the upper right, and then click the Chat tab. You'll see the option for switching chat on and off.
To install the voice and video chat plug-in:Please go to https://www.google.com/tools/dlpage/hangoutplugin, and click install. The installation should only take a few minutes.
To make the most of video calling you may want to sign up for Google+!