To compose and send a message
Tap the Home Button
> the Google folder 
> Gmail 
> the Compose icon 
.NOTEIf you set up more than one email account on your phone and want to send the message from a different account, tap the current Google Account (at the top of the screen), then tap the account you want to use.
Enter a recipient’s address.
As you enter text, matching addresses are offered from your Contacts list. You can tap a suggested address or continue entering text to enter a new one.
Tap the Arrow icon
(in the To field), to add Cc and Bcc fields so you can copy or blind copy additional
recipients.Enter a subject for the message in the Subject field.
Enter your email text in the Compose email field (below the Subject).
Tap the Attachment icon
, then tap Attach file to add an attachment from your phone's memory. Tap Insert
from Drive to insert files from Google Drive. Tap the Remove icon 
on the attachment to remove it from your message.
Tap the Send icon
to send your message.
If you aren't ready to send the message, tap the Menu icon 
, then tap Save draft or simply tap the Back Button 
.