Expandable Leaderboard



  • 728 Pixels wide by 90 Pixels tall (728 x 90) collapsed component;
  • 728 Pixels wide by 250 Pixels tall (728 x 250) expanded component

File Size Maximum:  50KB (728x90); 80KB (728x250)

File Type: JPG, GIF, or PNG

Animation/Looping: 15 Seconds (unlimited if user-initiated)

Background: Non-Transparent

Border: Min. 1 pixel border if background is white

Branding: Client name or logo must be featured

Clickthroughs: ​One clickthrough allowed per Unit. Please provide with the initial ATOL submission to avoid a delay in the posting of your ad.

Additional Requirements: If clearly-defined “OPEN” or “CLOSE” buttons are not included with supplied creative, default buttons will be placed in the upper-right corner of each component.

*Special Notes: Expands Down on Desktop (on click).

Not Currently Available for SOV Sites.



  • Short, direct message or heading
  • Single, dominant attention-getting element
  • A clear, concise call-to-action (CTA)
  • Advertiser name or logo



  • JPG - recommended for static ads that contain photographs, graduated screens or several colors
  • Static GIF - recommended for static ads with solid or few colors
  • PNG - recommended for static ads with crisp text and graduated screens or several colors
  • Animated GIF - recommended for ads with solid or few colors and only one or two animated frames