How do you get wallpapers on Roblox?

How do you get wallpapers on Roblox?
How to change Roblox background and theme

Launch Roblox and sign in to your account.
Tap on the three dots located on the bottom-right of the screen.
Scroll down and tap on Settings.
After getting into the Settings, click on the Account Info tab.
Scroll down and tap on the drop-down menu under Theme.

How to change Roblox background and theme
  1. Launch Roblox and sign in to your account.
  2. Tap on the three dots located on the bottom-right of the screen.
  3. Scroll down and tap on Settings.
  4. After getting into the Settings, click on the Account Info tab.
  5. Scroll down and tap on the drop-down menu under Theme.