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Hello, I'am using my 4000$ LG 55EG960V OLED 4K UHD television to view my photo from an USB key and use the diaporama function. But i have old photo which are in a small resolution(less than 4K), and there are not displayed in fullscreen so it is too small How to automatically upscale photo in fullscreen? (it was possible with my old 1080p philips television and also samsung 4k) Thanks you very much in advance.