Fit device width for mobile creatives

When HTML5 and image creatives serve as interstitials in a mobile app, Display & Video 360 checks to make sure the creative matches the device's width. If the creative isn’t wide enough to fit the device’s screen, Display & Video 360 will increase the creative size while maintaining aspect ratio and resolution.

Normally, when you increase the size of an image, the pixel density is reduced, which can cause the image to look blurry. Display & Video 360 uses smart upscaling to preserve pixel density. This ensures that your creative fits the ad slot without looking stretched or cropped.

To provide the best consumer experience, follow the mobile interstitial guidelines when building your creative.

A creative is only scaled when:

• It's not as wide as the screen of the device it appears on
• Serving as an interstitial on mobile app inventory

Preview device width scaling

To preview scaling:

1. Open a creative from your advertiser's Creativeslist.
2. Click Preview. A new browser tab opens with additional preview options.
3. In the "Preview mode" drop-down menu, select Mobile.
4. In the "Fit to device" drop-down menu, select Yes.

Turn scaling on or off

Scaling to fit device width is enabled by default for all HTML5 and image creatives. To turn it on or off for a specific creative, follow these steps:

1. Open an HTML5 or image creative from your advertiser's Creativeslist.
2. In the "Basic details" section:
   1. To turn it off, check Don't scale to fit device width.
   2. To turn it on, uncheck Don't scale to fit device width.