Samsung's Android Pie Update – known as One UI – is making major changes to the Galaxy S8, Galaxy S9 and Galaxy Note 9. The main interface has undergone a visual overhaul, and this is not more apparent than in Notifications
Biggest changes affect the notification panel on the galaxy's lock screen, which now has rounded corners for a somewhat hovering appearance. This redesign also fits in with the rounded corners of the Galaxy S9 (Note 9) and the upcoming Galaxy S10 for a more unified look.
Android Oreo gave Galaxy owners the ability to set the transparency of the notification background to make it more manageable. This has affected Pie. However, access to this setting is slightly different because the lock screen and security options have now been split into separate sections.
To set the transparency of your notifications, on the main Settings page, select "Lock screen" Tap "Notifications" on the following page.
On the Notifications page, customize the transparency of the lock notifications panel by: Move the "Transparency" bar until you get the desired effect in the preview window. In addition, you can also tap the toggle button within the "Automatically invert text color" option to automatically change the text from light to dark or vice versa, depending on transparency and background brightness.