Note: This option is available on Premium plans.
From the My Publications page, open the collection and click the Edit Settings ⚙ button for your publication.
Go to the VIEWER tab and click Browse.
Choose the image you want and wait for it to finish uploading.
Image requirements: less than 1 MB, no larger than 5000×5000 px. Use a slightly larger image to avoid pixelation — the image adjusts proportionally to the viewer size.

