The Donations app allows an administrator to include a hero image to be related to the donation page. At this time, the hero image is only used in the parent level page of a peer-to-peer fundraising campaign, and not on a standard donation page. To learn more about using the hero photo, see Adding a hero image to a Donation app page.
To display a large image on a Donations app page, simply add the photo in the Page Intro section of the donation page, using the Insert Image button on the WYSIWYG toolbar.