Click Compose in the upper left corner to write a message.

On the new page, click in the blank box beside To: and type the email address of the person you’re writing to. Add addresses in the Cc: field if you want to send a copy of your message to anyone else. Others receiving this message will be able to see anyone listed in the Cc: line.

Inside Subject:, give your message a title—then write whatever you want to in the message window. That’s the big box below.

Sending is the easy part. Once you’re done writing (and attaching photos or files if you want... see below), just click Send.

Here are some tips that can help you in the future:

Open your Address Book in a sub-window

Clicking To:, Cc: or Bcc: (see below) opens your Address Book in a sub-window, from which you can select recipients. Click Insert Checked Contacts when you're done.

Multiple Recipients:

Send your message to more than one person. Add additional email addresses after To: and separate them with commas (e.g., johndoe@yahoo.com, janedoe@yahoo.com, etc.). If you will be emailing this group again, you might want to create a category for them. That way, in the future you can send to the group in one click!

Bcc:

If you want to send a copy of your message to someone, and not let anyone else see that they’re getting a copy, click Show Bcc above the To: line. Bcc is “blind carbon copy. Bcc: recipients are invisible to the To: and Cc: recipients of the message, as well as to each other. For example, if you send a message to johndoe@yahoo.com with a Bcc: to janedoe@yahoo.com, johndoe will see himself as the message's only recipient. janedoe will also get the message, and she will see that you addressed and sent the message To: johndoe as well.

Check spelling:

If you’re composing in Rich Text– i.e., if you see the row of buttons along the top of the Compose window for Bold, Italics, etc., then click the button toward the left with a check-mark and “abc” on it. If you’re in Plain Text, click Spell Check at the top – it’s between Save As A Draft and Cancel. Click in the “Suggestions” box if you see the correct spelling you’re looking for, then click Change.

Attach Photos and Files:

Click Attach Files below Subject:. In the window that opens, click Browse to find and select the file you want. When you've got it, click Open. Repeat these steps to attach more files, and when you’re finished, click Attach Files.