I have several smart collections of photos taken in a particular location, which are built up using keywords. All works fine. Decided to set up a separate collection for "top 40" images. Set up separate smart collection with same key words - worked fine, all 550 photos appeared. Set an additional smart collection criterion "pick flag as flagged" and, as anticipated all photos vanished from smart collection as non are flagged. However, when I then set the flag it made no difference. Smart collection criteria don't seem able to look at flag status. Have found comments about this on line, but they all relate to older versions of LR. I have up to date CC version....any ideas?