Use different background images on different giving forms

Open Online Giving → Campaigns or Online Giving → Forms, select the campaign or form, then go to Giving Experience → Form Settings & Display → Display. Choose the relevant Pre-Payment Form, Payment Form, or Post-Payment Form settings; older interfaces show those as separate tabs.

Yes. Open the individual giving form’s Display Settings and upload its Background Image for the pre-payment stage; review the payment/post-payment stages too. The editor can carry a newly selected pre-payment image into stages without their own image, so confirm each stage before saving. Configure another form independently and preview desktop/mobile; background images may be omitted on mobile in the classic layout.