Samsung Galaxy S9 Manual page 8

Using your phone
Edge screens
Edge screens deliver always-on access to text, email,
notifications, news, and more.
To choose which Edge screen you want to use and
customize the information it displays:
> From the Home screen, swipe up for Apps and
then tap Settings > Display > Edge screen
handle
Edge
Swipe left to see
notifications, missed
calls, messages,
calendar events, and
much more.
.