Here is the situation Dell 31.5 inc 4K monitor (actual PPI - 139.87) Windows 10 - UI scale 150% (scaled PPI - 139.87/1.5 = 93.2) Now Acrobat Pro takes into consideration the OS UI scale, therefore, the resolution is set to custom 93 PPI. Then 100% show the real-life print size Photoshop doesn't take into consideration the OS scaling (for the actual canvas not for the UI) therefore the screen resolution is set to 139.87 PPI. Then 100% show, the true-pixel size, and "View>Print size" show it in real-life size which in my case is 46.33% of 300DPI document. Indesign don't have any of the options and set the screen to actual size just put it on 100% which is not the real-life size. I have to change the Zoom Level to 97% the have it close to the real size. I think it is a huge problem for a program that is only used for print. Why don't we have a place to set hour own custom PPI. you should be ashamed this so basic Ziv
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