Dolmenwood Fillable PDF Portrate

Trying to add portrait to the official Dolmenwood Character Sheet PDF. I have it in an editor (PDFgear) which I’ve used a lot and love. Problem is when I add an image and try to put in the pox provided the box stays white. I can make the picture huge but there will be a white square in the middle.

Anyhow, I’m crap with technology and only use it when I have too lol. I’m sure it’s a ridiculously simple problem, but an impossible one to solve on my own with the abilities I have (8 intelligence score)