HTC One Remix - Manual (Page 203)

Want to loop in more recipients in a carbon copy (Cc) or blind
carbon copy (Bcc) of the email message? Tap > Add Cc/Bcc.
3. Enter the email subject, and then compose your message.
4. If you want to attach a photo, video or file, tap > Attach file, tap
the attachment source, and then select the files you want.
5. Tap to send.
Replying to or forwarding email messages in Gmail
1. In the Gmail inbox, tap the email message or conversation.
2. To reply to the sender, tap . Or, tap and choose whether to
Reply all or Forward.
3. Do one of the following:
§ If you're replying to the sender or you selected Reply all,
enter your reply message.
§ If you selected Forward, specify the message recipients.
Tap Respond inline if you want to interleave your new message
with the received email. But this removes any attachments or
formatting in the original email message.
4. Tap to send.
Email 203