One of the nice new features in OS X 10.4.8, released this week, was the improved zooming technique using a mouse scroll wheel; hold down Control and scroll, and everything on screen zooms in and out very nicely.
I just noticed this evening that the same trick applies when you’re using the two-finger scroll trick on a notebook computer’s trackpad; try holding down control while you two-finger scroll. Everything zooms. Three-finger zooming.
I use the zoom feature quite a lot, usually to concentrate on a paragraph of text I’m reading or writing. It’s one of those things, like Quicksilver, that I miss most when I’m using someone else’s Windows machine. The new keyboard command for it is much more convenient that Command+Option 8 - which still works, incidentally.