When it is necessary to display different images in the same location of your document, and your image set is limited to a few repeating images, you can use Image Collections in order to present a list of available images to clients ordering the document as part of an order.
In order for an image collection to be used, you will need to create an image box in your PrintShop Mail Design document. The expression for the image format must also be specifically refer to a database field, even if it doesn't exist. You can simply edit the expression and type in a field name such as [MyImageField] to do this. Once your document is ready, send it to PrintShop Mail Web.
On the PrintShop Mail Web side, you can create a new image collection using the Collections menu link. Make sure the collection is assigned to the same company as your uploaded document. In your document's properties in the Publication Types menu, go in the User Input fields section. Click on the field name that corresponds to the one you entered in the image's expression (for example, MyImageField) and change the Item Type to Collection. Choose the image collection you created, and click Save.