For: Explaindio 5 Agency and Explaindio 5 Agency Lite
Your sample pages and opt-out pages show your logo and your button color.
You can also set your logo and colors in Animation Studio > Brand Kits. Your default kit (the one marked DEFAULT; click Set as default to pick it) is the one used on sample pages.
If it doesn't work: To change your logo, click Replace logo; to take it off, click Remove. Your brand shows on sample pages only with Explaindio 5 Agency or Explaindio 5 Agency Lite.