[mcclim-devel] question about behavior of describe

In the old days, I was able to click on an object that I had displayed in a McCLIM application frame and describe it (using "describe presentation"?). Now this isn't available any more. Now when I use the right mouse menu, I see "Describe," but I have not been able to persuade it to describe the things I have presented. For that matter, it doesn't really do anything even on numbers. I realize that this is probably a very dumb question, but is there some primer somewhere on how to make this do something nice with my presentations? Thanks, R