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I am trying to highlight some text in the a pdf generated with latex, however sometimes it misbehaves and selects an entire region. Below is a gif which shows the effect I'm having (I tried to scroll to "remove" the blue selection which was left over). Is this a problem with the generation of the pdf? or perhaps macs "preview" app?

enter image description here

Edit: I have tried this in the "skim" app on mac and have the same problem.

user79950
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    Welcome to TeX.SX! I like the way you have illustrated your problem. – onewhaleid Jun 25 '15 at 23:01
  • Welcome! I'm not sure since I'm not a Mac user, but did you try another PDF viewer? That would be my first suggestion because I've never noticed anything like this in my LaTeX documents. – Paul Gessler Jun 25 '15 at 23:01
  • Hello! Yes I do have this problem in the "Skim" app as well. – user79950 Jun 26 '15 at 00:01
  • Can someone tell me why this was put on hold? Obviously the problem is in the generation of the pdf which is a tex issue – user79950 Jun 26 '15 at 19:41
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    This issue is to do with the algorithms the PDF viewers use to determine where lines of text are. TeX can't influence that, so it's really a viewer issue. – Joseph Wright Jun 27 '15 at 09:28
  • @JosephWright, I have read and highlighted many different PDFs, and tex generated PDFs seem to cause the huge difficulty. Does anyone know of anyway a tex generator could help mitigate this? Has no one else in the tex community encountered and/or fixed this? – user79950 May 10 '16 at 21:52
  • I can't really believe that tex can't in some way help PDF generators by creating "selection box helpers" around math enviorments – user79950 Jan 27 '17 at 19:23

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