I sang in a choral concert this spring. The program title was "When Is the Time?" It got me thinking. For at least six months, I've been thinking about switching from the U.S. half-letter size that I've been using since 2020 to A5. I even tried it for a few weeks last year, but the experiment failed. But why? I eventually figured out that I had gone into the switch unprepared. I didn't have