Highlighting text in PDFs

I am using iPadOS to do readings for classes (viewing PDFs natively) and am trying to highlight text using Markup with the highlighter tool, but it ends up painting over the text instead of highlighting the background.

What I want to do (with an Apple Pencil or similar stylus) is select and highlight the text background, not paint over it, and then quickly annotate beside it. Why can’t I do this within the markup tools?

iPad Air 3 Wi-Fi

Posted on Sep 29, 2019 2:01 PM

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2 replies

Sep 29, 2019 4:49 PM in response to sberman

When I used the term viewing PDF's natively, I meant opening a PDF from Files with the application that is built into iPadOS. It does not appear to be Books by default. In macOS it is the Preview app. I am not sure what the iPad OS equivalent is called.


Anyway, I am aware of selecting text and highlighting a text selection as you suggested (this occurs outside of Markup). But I would like to do this with an Apple Pencil within Markup (so I can quickly jump between highlighting and writing notes with the pen). However the Markup highlighter appears to just be a crude water-colour that has the unfortunate effect of obscuring the black text, rather than selectively and exclusively highlighting the otherwise white background.


Am I using the wrong app to view and annotate PDFs? I haven't found one that allows one to annotate so smoothly on a PDF.

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Highlighting text in PDFs

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