Custom overlays can be used in both form-based templates and in Interactive Designer templates. In Interactive Designer templates, any text or image fields that your customers add will be limited to being underneath overlay fields.
To prepare an image for being an overlay, upload it to the Graphic Files section of your template’s Assets area.
To set up an overlay field in a template, select “Image” as the field type and “Graphic File” as the data source in the Field Type tab.
In the overlay field’s Data Capture tab, select the graphic file that you uploaded earlier.
The field’s Format tab is where you specify that it will be an overlay. In the Stacking Order menu, you can enter a number between -1 and 110. Each number represents a different layer of your template. -1 places a field behind the master PDF. Layers 1-100 are normal layers, with a higher number meaning closer to the front. Layers 101-110 are for overlays; no customer-added image or text fields can be placed above these layers.
If you want the overlay to show up only on the preview but not on the production file, select “Proofing Only” from the Field Usage menu. If you would like it to be on the production file and in the user preview, select “Proof & Production File.”