I have used Okular for some time as a document viewer but have recently
discovered the "Review" tool to annotate .txt files - useful, clunky but
manageable - but I have one clunk with which I can't deal.

I use the "Ellipse" quite a lot and - owing to the vagaries of my laptop's
palm-rest, console (or whatever it's called) and the mouse, trackpad (or,
again, whatever that's called) it includes - I have ended up with a large blue
dot of which I can't get rid. I suspect that I opened the "Ellipse" function
and closed it again. I was left with an ellipse which was never expanded.

I read the very useful post:

viewtopic.php?f=251&t=101856&p=221060&hilit=okular+delete#p221060

" hover over over the line and when your account name ( "Author:
account_name") appears next to the hand icon right click -> delete"

Sort of clunky but works - except that the 'dot' does not show the author - the
best I can get is :

Add Bookmark
Fit Width

I have some screenshots of what's going on but I have no idea how to attach
them.

The Okular Review function is useful but still seems clunky.

A list of annotation objects contained in the PDF should be visible on the "Reviews" sidebar tab - can you access this particular dot ellipse from here?

Durr - looks like a case of RTFM. Job done, thanks a lot.

dmk