Samsung Galaxy S5: How to Send an Email Message in Gmail App in Android 4.4.2 Kitkat

The floating red compose button is a new feature that can be found in the latest Gmail version, Gmail 5.0. This button gives Gmail app a new look since it replaces the regular-compose-email icon that you used to find on the action bar. This button will also let you to easily access the email composition window since it's always accessible regardless the inbox category or the email label that is being opened.

How to send an email message in Gmail app?
You can do so by using the following steps:

1. Open Gmail app. By default, the primary inbox of the currently used account will be displayed.
2. Tap located at the bottom right corner of the screen.
3. By default, the From field will automatically be filled with the email address of the currently used account. But, if you have added multiple accounts and want to switch to the other one, then you can easily do so by tapping and then select the required account you want to use to send the email message.
4. In the To field, enter the recipient's email address. While you're typing, all matching contacts will be displayed and you can select one of them.
5. In the Subject field, enter the subject of the email message.
6. In the Compose email field, write down your message.
7. If needed, you can attach files in your email message by using the following steps:
• Tap at the action bar and then select Attach file.
• Tap at the top left corner of the screen and then select the required category where the files you want to attach are placed in.
• Select the required file you want to attach.
• If you want to attach some files at once, you can multi select them by tapping and holding the first file and then single tap the next ones. Tap Open to attach the selected files.
• The selected files will be attached.
8. Tap to send your email message.

Basically, sending an email message in Gmail 5.0 has a similar way as you used to do in the older version. The difference is now the icon to compose a new email message is displayed as a floating icon and is located at the bottom of the screen.