Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
The Print Center is also available from the App Switcher when you have a print job queued up.
You can also view what apps are currently running in the background by double-pressing the Home button or swiping up from the bottom of your screen to open the App Switcher.
Source: https://www.devicemag.com/how-to-close-apps-in-iphone-7/