Phones are getting bigger and bigger, making it harder and harder to reach the notification bar. Samsung is here to help because it has introduced a gesture in One UI for Galaxy devices that makes it easier to access the notification bar on your home screen.
On your Galaxy S8, S9, S10, or Galaxy Note 8, Note 9, or Note 10: You no longer need to flick your thumb up or use two hands to access the notification tray. With this simple gesture, you can be a one-handed Galaxy Assistant that makes navigating to your notification drawer as easy as swiping down. Swoosh.
Enable Swipe Down for notification panel
Long press on a blank space on the home screen, then select "Home screen settings". From here, search for "Drop down for notification panel" and check this box.
When this option is on, you can quickly swipe down the splash screen to lower the notification tray with a gesture. This only works on the default home screen. If you're using a custom launcher, they usually have their own version of this gesture.
Also note that this does not work on the Bixby page on the leftmost home screen. It will not work if you're in your app drawer or other apps. So it does not work everywhere, but it's still very handy!