When I press C-x s (save-some-buffers) or C-x C-c (save-buffers-kill-terminal), Emacs displays the names of modified buffers one by one and asks what to do with each (save, diff, pass, ...). Pressing y one by one is slow. Pressing ! doesn't let you see what buffers are being saved.
How can I have the names of all modified buffers displayed first so that I can mark off some of them and save all the other quickly?