I managed to fix it, thanks to your instruction. I skimmed the config.json and spotted <"actorImageScaleX": 90,> and edited it to 100. Now its all as it should be. Its strange though... because there were no scaling added when on the F9 menu (which I assumed meant the default was 100%). Whats more, when I edit the portrait scaling in the editor, it seems to have no effect at all, even if I try to reduce it! Could it be that the default is a hard-set 9O% (for the main menu only)?