it worked, but as you says it’s very, very, very clumpsy.
Especially, if you have multiple hightlighted portion on a page, see screenshot, you need to try all of them 1-by-1 until you find the right one.
There used to be another process, and the help suggest so (see docs okular annotations), but can’t make it work.
Do you have properties when you select the item and righ-click? I don’t see my very 1st post.