Why do the Highlights Cover the Words?

Note: This situation only occurs in OS 10.13 because of the compatibility between PDF Reader and the system. 

When you use the highlight, please kindly define the opacity in “Colors”.

Reduce the percentage of the opacity to help you read clearly. 


If you still have the problem, tap the highlight part, and choose ”Properties” to change the opacity. This will make the sentence readable.




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  • 0
    Gerry Taylor

    I'm using a mac air not iOS 10 (which i wouldn't be anyway). And opacity IS set to transparent. Doesn't

    go near the actual problem of "highlight" Lighting up the entire document.

  • 0

    Hello. The highlighting issue only occurs in MacOS 10.13, so we offer the suggestion/alternative to those who don't want to/can't update their Mac to the latest OS. Currently, the highlighter works correctly (without adjusting the opacity) on other OS versions. If you still have concerns or questions, please feel free to contact us. We'd be happy to assist you. :)

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