I annotate and higlight text all the time with GNOME's document viewer. It works so well I hadn't even considered people might find it problematic. https://app

I annotate and higlight text all the time with GNOME's document viewer. It works so well I hadn't even considered people might find it problematic. https://apps.gnome.org/en-GB/Evince/ https://apps.gnome.org/en-GB/Evince/ I realise it probably doesn't support some 'fancy' PDF stuff like signatures, but I don't use them.