* in grid view, select all photos
* remove keyword from keywords (the big text box in right panel, in 'Keywording' section).
Thanks Rob! I didn't think about trying it from the Keywording panel.
I didn't think about..
Perhaps not the most intuitive, but that's how I do it..
Free tip: to assign to all, remove the '*' (asterisk).
Rob, now that I can remove a keyword from a group of photos the way you describe, do you know why it won't work when using the Keyword List panel instead (my original question)?
You have to switch to grid mode.
It's one of those idiosyncrasies of Lightroom. What Lr really meant when it said "selected photos" is:
"selected photo" (singular) if in loupe view, or "selected photos" (plural) if in grid view.
How funny...it's the simple things that cause the hair loss! I thank you much for the enlightenment!!