1 While in Gmail, click on the cog icon in the top-right corner
and then scroll down the menu of options to choose Settings
. When in Settings, scroll down to the ‘Personal level indicators’ section.
2 Click on ‘Show indicators’. This feature will display an arrow for messages sent to your address and a double arrow for those only sent to you. Click on Save Changes at the bottom of the screen.
3 The indicators will now be visible on messages listed in your inbox. Look at the small tab icon to the left of each message and you should notice that the aforementioned arrows will be present.