A fully universal two-unit format with an interactive front layer that scrolls over a background. Adapts to any canvas size.

Demo Link: View Demo

Platform: Responsive (All Platforms)

Format: HTML5

Size (Recommendation for 300x250):

  • 300x250 / 320x250

  • 300x250 / 640x250

  • 300x250 / 1280x250

Environment: Desktop & Mobile Web


  • The experience is optimal when users need to scroll down through content to reach the ad.

  • Miniscroller can take up width of the container, or alternatively, the width of the screen (or browser viewport on desktop). 

  • On sites that have a dedicated navigation column, or another multi-column layout, a full-width placement can yield undesirable results. By setting a Screen Breakpoint Width of 800px, this would ensure that all Unit Sizes below this width on screens below this Screen Breakpoint Width will take the full screen width. However, on desktop Miniscroller would continue to take container width as a default.

Mobile Supported Actions

  • Press/Tap to Call (direct connection from the phone to the advertisers call centre)

  • Press/Tap to download iOS application (link to page in App store)

  • Press/Tap to download pod cast or song from iTunes

  • Press/Tap to link to your mobile site

Specs and Templates

For clients building their own Universal Expandable Flex creative, please refer to the following link (a Celtra login is required):