create a long portal with whatever relationship shows your records and place the image in the body?
Found the method.
- Open inspector
- Click on layout empty space part
- Go to appearance tab in inspector
- (Inspector should now be selecting "Layout Background")
- Set the fill to the image desired
- Then make sure the body layout part does not have fill
Set "body" fill as "none", then "Layout Background" as "Image".
AH, yes! I'd forgotten that Layout background was independent of the Body part. In my testing the various 'states' of the Body also needed to be adjusted if you have alternate and active checked in the Part Definition.