Custom thumbnails replace the thumbnail automatically generated for an asset during the upload process, with the image of your choice. 

Adding a custom thumbnail

Custom thumbnails must be a PNG, JPG, or GIF file; note that thumbnails formatted as GIFs will not animate in gallery or asset detail contexts. Thumbnail images are automatically resized to 150 pixels at their longest side, then scaled proportionally.
  1. Navigate to an asset's detail page .
  2. Use the action  menu and choose Add custom thumbnail
  3. Choose a supported file type from your local storage; this file will replace the system-generated thumbnail.

Video keyframes and custom thumbnails

You can use a video asset's keyframes to choose a custom thumbnail for the chosen video.

  1. Navigate to a video asset's detail page .
  2. Click on the Keyframes tab.
  3. Click an available keyframe thumbnail.
  4. The preexisting thumbnail will update to match the selected keyframe.

Document pages and custom thumbnails

You can use a document asset's pages to choose a custom thumbnail. Supported document file types include DOC, DOCX, PDF, PPT, PPTX, and INDD files.

  1. Navigate to a document asset's detail page .
  2. Click on the Pages tab.
  3. Click an available page thumbnail.
  4. The preexisting thumbnail will update to match the selected page.

Removing a custom thumbnail

Custom thumbnails can be removed by resyncing an asset with a custom thumbnail. When an asset with a custom thumbnail is resynced, a new default thumbnail will be generated; in some cases with some file types, this may appear as a generic file type thumbnail. This action will delete the custom thumbnail and it cannot be retrieved.

Notes

  • An asset's thumbnail is used when performing a visual search . This means if an asset is using a custom thumbnail, visual search results will be based on that thumbnail rather than the original asset.
  • If an image asset is manually repurposed , the preview used during the repurposing process will use the custom thumbnail. The final repurposed result will reflect the underlying asset rather than its thumbnail.
  • If you are uploading an InDesign document and would like to preserve any template image content in thumbnails and previews in NetX, see our guide on  INDD thumbnail support
  • Any reviews that include an asset with a custom thumbnail will use the custom thumbnail as the preview while viewing and annotating the review..