Filters for beginners: What am I doing wrong?

[tjmillar]

I have read help and it seems very clear and obvious. But I can't make the program behave in the manner described.
I label a handful of images with a green label (which will indicate "done" in relation to my keywording task). I expect that I will want to be able to filter out those images I've already worked on.
To see if that works, I select @all in the categories window, then in the filter window on the right I click on the green label, tick the "rating, label & collection" box, and click the "apply filter" button. But nothing happens.
I tried applying a star rating to a handful of images, then tried to filter for just those images. Again, nothing changes in central file view window. What am I doing wrong?

[hluxem]

Make sure the sure the filter manager is expanded and the Filter Panel checked.
More information in this thread:

https://www.photools.com/community/index.php?topic=5505.msg38139#msg38139

[Mario]

All filters can be individually enabled and disabled.

1. Make sure the the filters you are working with are enabled (blue bar):

2. Make sure that the Filter Panel entry in the Filter Manager list at the top is checked.

[tjmillar]

Thank you both! My apologies in particular for missing essentially the same answer in another post. I know that the kindness and patience offered to noobs is tested when the answer they're looking for is already right there in the forums. I promise I will look harder before I post any more evidence of my ignorance!