I often have a scenario where I am searching through a log file and use the option to Mark All. After looking at the bookmarked lines, I see that some of the lines may be pertinent and others not. I would like to be able to do another search, where I rule out some of the previously Marked lines.
So maybe I search for "ERROR.*" and Mark All and get these results:
ERROR - some issue
ERROR - some issue - but this one is not relevant
ERROR - some issue - and neither is this one
ERROR - some issue
ERROR - some issue
Then do a second search for "this one" and UnMark All so I'm left with these results: