Use the Attachment Viewer configurable app template to make photo, video, and PDF attachments easy to view. Attachments are accessed through features in a hosted feature layer or an ArcGIS Server feature service in the map you use in the app.
Options
To see the options available for this template, search your ArcGIS Enterprise portal using the app template name and open the app template item's detail page.
Requirements
At least one of the feature layers in the map you use in the app must contain photo, video, or PDF attachments.