Jacob Rus writes: "Apple’s Cocoa text system is a complicated beast, but also extremely flexible, and with a bit of work, it can be molded to match many working styles. This how-to covers the 2 major ways of customizing the text input system: Default key bindings, and for still more control, input managers. I’m writing this guide because nothing like it currently exists. There is incredible room for flexibility in customizing the Cocoa text environment, but most users—even power-users—have no idea of the available options."