Sure, here is a sample. The yellow is a manual highlight, where as the blue are automatic highlights of links.

https://s3.amazonaws.com/zotero.org/images/forums/u810384/f625x8l715otvfo6jxzz.png

I am also facing this issue and it makes reading a document very hard for me without having a reading impairment. I'd imagine for someone with an impairment this is an accessability issue. I would be very greatful if you managed to fix this. In the example below there not one manual highlight. All blue highlights are automatic. For me it is more than enough, if the citations are in blue font, as usual.


https://s3.amazonaws.com/zotero.org/images/forums/u8840376/v1m7cxtbe35szdphhrgi.png

Toggling this on/off needs to be a feature of Zotero. I agree with a previous commenter that this is an accessibility issue and renders the documents very hard to read in the app. Please let us know when this is addressed or if there is a current fix. Thank you!

@jkroes, thank you, this is so helpful and improves the readability a lot

@abissonn @jkroes
For anyone using Zotero 10 and looking for a temporary solution:

I updated the existing “Hide Citation Highlights”(by jkroes) plugin to work with Zotero 10:

https://github.com/XuebaStudy/zotero10-hide-citation-highlights

It hides the automatic citation/link highlights in Zotero's PDF reader while keeping the citations clickable.

I made this mainly because the original plugin was no longer compatible with Zotero 10. Hope it helps!