The header and logo images for a collection can be added or edited at any time from within the collection. The logo image selected will be the preview image for the collection.
To add a header image or logo, choose a collection, and within the collection, click Update Header Image or Update Logo. Select a file from the collection or search and filter to use files from a different collection.
Header images can be dragged into the desired position; logos will automatically size to fit the logo area.
Header and logo images can be shown or hidden in Collection Settings > Collection Display.