How to list all available .plist keys on a certain domain application by defaults command? I want to know all keys (property list) which available on certain domain application, as example I could list available key for com.apple.dock by entering this command:

$ defaults read com.apple.dock


but somehow the output of this command only showed the active property list key, and yet not all available key for com.apple.dock listed there.

Anyone can help me on this?
This is not a trivial task, if I recall correctly people run the strings utility at the command-line against an Application, and look for things that match a structure similar to com.domain.FeatureName. (com.apple.iTunes, ch.cyberduck.CyberDuck, com.panic.Coda, etc.)

The likely easiest way to manage these overrides is by a System Preferences Pane by the name of Secrets. Using this installs a Preference Pane into System Preferences, and gives you an interface into choosing an application and changing their settings to your particular preference.