To quote from the excellent movie "Spinal Tap," "it's a fine line between clever and stupid." I may have fallen off that fine line in writing TidBITS-114, because despite a few clues and hints, the fact that it was indeed our annual April Fools issue appears to have gone generally unnoticed. Almost everything in that issue was false - though often entirely possible and even intensely desirable - with the exception of the IBM marketing move (which was strange enough to be an April Fools joke), and the Dolch projection panel (which I used to make the last article more believable). Sorry folks, if I threw you for a loop.
Compare More Easily in Apple Mail
In Apple Mail, if you need to work back and forth between two different views of Mail's mailbox contents, you can do so quite easily. For example, you might want to look at a mailbox holding all filtered-in sales orders from the past week while also looking at a smart mailbox showing unanswered customer questions.
To avoid constantly clicking between mailbox views and losing your context each time, choose File > New Viewer window to get a second window and then arrange each window as desired.