Is it possible to toggle the visibility of annotations / reviews in a pdf? It seems a useful feature but I could not find how to do it - it seems I can only delete annotations rather than hide them temporarily. Hopefully I only overlooked the right button; then I would be glad if someone could point out where it is hidden

Hi glechner,
In the left navigation panel you have four items: contents, thumbnails, reviews and bookmarks. You can go to reviews and change the color of each text. For example, in order to print the document. The reviews places will be there and you still can change the color again in the future.
Regards,