HS2: Thanks, activate-find-symbol is what I was looking for.
As for ESC, I suspect it has to do with using the VIM emu, and that you can type in the Search Results and Build windows. When I activate the Search Results (Alt-ts), then press Esc, I get the message 'already in command mode' in the status bar. That's not true, though -- typing any key enters it into the window, w/o having to do anything to get in to Insert mode. As for the Build window, Esc does nothing, and any key typed is entered in to the window.
It gets better: sometimes the Alt-t prefix works (Build, Search Res.), but sometimes it doesn't (Preview, Find Symbol). Is the difference in behavior due to a difference in 'kind' in the windows -- some take input, while others don't?
CB