Ive been doing some more testing comparing highlights between Adobe, Preview and Skim using a scanned/OCR pdf. I used two versions of the pdf, one created in Adobe, and the other created in Adobe and then subsequently saved in Preview. Ive attached a png showing highlights from Preview and Skim. A few observations:
1) It makes a difference for all three programs whether the pdf was subsequently saved in Preview or not. The most dramatic difference can been seen in the Skim-edited examples, with the Adobe-created, Skim-edited pdf showing the least amount of height/coverage. This is unfortunate, as one of my main reasons for using Skim is to avoid the massive jump in file size that occurs when saving such a pdf in Preview.
2) There are, at least on my setup, undeniable differences between the Preview-generated and Skim-generated highlights. The most obvious of these is the rounded edges of Skims highlights vs. the squared ones of Preview. But beyond this theres also an obvious difference in height which is most easily noticed if you compare the whitespace that remains around the letters in the title in the attached png.
I can send a page out of the pdf Im working with if anyone is interested in looking into this any further.
That's interesting, because in fact in Preview the highlights are considerably higher on any pdf, i.e., they even overlap across lines.
I've experienced the problem with very small highlights especially in scanned and OCR'ed pdfs. So I guess it has to do with the PDF.
Nonetheless, I agree that it would be nice to have the highlights a little larger in general.
Post by Charles LoweThanks for the reply. Interesting, does it use a different or older version of PDFKit than the current version of Preview? Because the highlighting in Preview is significantly taller and non-rounded (and thus, for my purposes, more useful).
Cheers,
Charles
It cannot use a different version, because it uses the exact same executable, which is part of the system.
So I doubt it really is different.
Christiaan
Post by Charles LowePost by Christiaan HofmanPost by Charles LoweIs there any way to change the height of text highlighting? I've attached screenshots of the same PDF as annotated in Preview, Skim, and Adobe Reader DC to show what I mean.
Thanks,
Charles
No, there is no way to change this. The highlight is drawn by Apple's PDFKit, we have no influence over this.
Christiaan
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