Time to bring Uncle Ernie into the conversation? Smart move. Here’s how to invite more people to your conference:

Click the "Conference" button in the Conference window (it’s got a smiley face with other smiley faces behind it).

Select friends or groups from the list and click Add.

Include an optional message.

Finally, click Invite to bring them into the conversation.

Check "Enable Voice for this conference" to enable the voice feature.