Because the Bark Phone is a Samsung, it comes with most Samsung features, like Themes to customize the look of the phone. Here's how to use them:
On the Bark Phone's home screen, tap and hold over an empty space of the screen.
Tap Themes.
Select a theme to download.
Once it's downloaded, you can tap Apply to install it. Themes may change the look of the app icons, keyboard, wall paper, lock screen, and even the navigation bar.
To return back to the original theme, just tap ☰ Menu in Themes. Then, tap My stuff. Tap Default to go back to the original theme that came with the device.