When you’re writing up a long document, or even in the middle of a simple one, it’s good to be able to move around and edit in the text without taking your hands off the keyboard. All the little switches from keyboard to mouse and back again take up valuable time, and–perhaps more importantly–force you to change the way your brain is processing information.
Using the arrow keys is a good way to move the cursor around, and of course there are the standard Command key shortcuts, but did you know that there’s some legacy keyboard shortcuts that come to us all the way back in Emacs, a popular text editing program for Unix, the operating system Mac OS X is based?
There are, and here are a few good ones. I’ve tested them in Text Edit, but chances are several Mac text editing programs will take advantage of these.