Contacts makes it easy to keep track of the people you communicate with most often. You'll be able to access the same contacts across Mail, Calendar, and all of your other Apps.
The contact picker displays a list of your individual contacts and contact groups. To access a list of your contacts when composing a message, click To and the contact picker will display in a new window. Select the name or address of the person you'd like to email and click Done.
Your contacts will also auto-complete when you enter text in the To field when composing a message. Simply start typing and select the appropriate contact from the resulting list.
To manage your contacts list in Mail, scroll over the Mail drop-down list at the top of the left sidebar and click the Contacts.
The Contacts Manager that is shown below will be displayed. Here, you can add, delete, edit, view and sort your individual contacts and contact groups.
In the Contact Manager:
When you're done managing your contacts, be sure to click Save.
Note that when you Reply, Reply to all, or Forward mail, email addresses will automatically be added to your Contacts list.
You can import contacts from Outlook, Hotmail, Yahoo!, and other services into your Contact list. To do so, first make sure your file is formatted as a CSV (Comma Separated Value). Then, access the contact manager and import your file by clicking Import Contacts... on the right side.
Note that you can only import up to 3,000 contacts at a time. If you have more than 3,000 contacts, you'll need to create multiple CSV files and upload each individually.
You can also use Google Email Uploader to import mail and contacts from your email client. To do this, download the Email Uploader . This tool will walk you through the steps needed to import your mail and contacts.