![]() ![]() The white lines are actually an artifact of the kind of antialiasing that Adobe products use. If they do get thicker when you zoom in, then they’re really there. The best trick I ever learned for dealing with these came from Michael Stoddart, who said: Zoom in and out! If the white lines are always one-pixel thick (they don’t get thicker or thinner), then they are just screen artifacts and you can probably ignore them. See the thin white lines around the trapazoid at the top and around the text at the bottom? In the vast majority of cases, this appears only on screen! Sometimes it shows up on low-resolution printers, too, but virtually never in high-res commercial output. The result is that sometimes white peeks out between them. ![]() ![]() But these opaque areas have to fit together like a mosaic, each piece right next to the next. PDF version 1.3).įlattening transparency means “faking it” by creating opaque areas that look transparent. This doesn't always happen to my PNG files as I recently have been saving PNGs that work just fine so I don't understand the issue.Have you ever opened a PDF file and seen thin white lines where there shouldn’t be any? In general, the white lines, or “light leaks” are due to a PDF that includes flattened transparency - transparency effects (such as placed PSD files) in a file saved in a file format that doesn’t support transparency (such as Acrobat 4, a.k.a. However the PNGs that I sent to my computer and back to iCloud Drive and still displayed transparency, I saved those to my Photo Library (which showed that they were in fact PNGs) then reuploaded them to iCloud Drive only to find that they had been converted to JPEG upon saving. Does anyone have any idea what's happening?ĮDIT: I sent some of my PNGs to iCloud Drive and found that they somehow turned into JPEGs. When I exported them, they appeared having transparent backgrounds, but when I sent them back to my phone, they were white. I even exported them to my computer, to iCloud Drive, then back to the Photos app to check if they were still PNG files and didn't somehow convert themselves to JPEG, but they still were. I don't exactly know what went wrong or how, since images that previously displayed a transparent background suddenly don't anymore. I started having problems with my PNGs a month or two ago in which half of them no longer show a transparent background when imported into my photo editing apps. I frequently use PNG files in photo editing apps on my iPhone. ![]()
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