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  1. #1

    Member Since
    Jan 20, 2012
    Opacity in Preview OSX Lion
    I'm having problem with the Preview annotation's opacity function when working with PDF files. You see, it doesn't work at all. When adjusting between 50-100%, nothing changes. When 0-50% it becomes totally blank. I don't see this problem with other files such as JPEG.

    Please help!

  2. #2

    Member Since
    Jan 22, 2010
    Victoria, BC
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    You are correct. I tested this on my machine and it works exactly as you describe. Congrats, you found a bug!

    You can write an email to with a subject like "Preview bug (opacity) and describe the issue, or report it on the support forum.

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