For offline viewing, and a printable manual, go to:- → CHDK User Quick Start Guide - In .pdf format. (Last update Jan 2012) Below are listed the MAIN features of CHDK, as originally developed by GrAnd and other contributors and documented in 2009. These are pretty much "set in stone" and are the main backbone to what CHDK is all about. Please keep in mind that CHDK is a fluid and ever-evolving piece of programming. Several new Firmware Usage sections were added below (in "Special Build" categories) to reflect some of the changes that have since been adapted to most everyone's newer builds of CHDK