Xerneas

Hi, I need help with checking the durabity of my armor and weapons. I have seen many YouTubers's Hexxit series and i notice that they hae a durabity tag. For example a diamond giant sword might have durability of 1760/1900 (Just an example). So i want to see the durability of my sword too. Can someone tell me the settings to enable the durability in numbers. Any help would be much appriciated. - Thank you :)