Hi, I added Viber (it's like Whatsapp, only better) to my Pro 4 a few days ago and it only ever loads in very small. The box is about one sixth the size of the screen and text is so small it's barely readable. I've looked at the options in the app but none of them mention changing font size or anything. All the other stuff I'm using is ok (Edge, Chrome, Steam, Sketcher, Freda, Freshpaint, Paintshop Pro x8 etc) and seems to auto size to full screen. Any suggestions,or is it just an actual issue with the app itself and I need to wait them to update it?