[Koha] Patron card creator --- background image and barcode

Dear All: I am able to use the patron card creator to create a PDF file for the patron card.Really appreciate this wonderful tool function. However, I encounter an issue, just wondering that anyone has the same problem or not? Our patron card design has a background image, which is the same size as the plastic card, (2" height * 3.25" width).If we prefer to locate the barcode at the front of the card, the barcode will be covered by the background image. Just wondering that ----Is there a way that we can bring the barcode to front of the background image?Anyone who has the same experience please share your experience.Really appreciate it!! Sincerely,Jiahui (Sophia)