For users operating systems OS X, dock is about the same thing is Quick Launch's (Or taskbaracquis) for users Windows. Also, it may be custom cu shortcuts for different applications or folders depending on your preference. Unfortunately (in contrast to the system iOS), dock in OS X not comes with option reset it to its settings default. If you are using Mac OS X and you want to restore default settings (Including the default shortcuts) of dock's for various reasons (it became too crowded, many shortcuts not working properly etc), you can do so by following the instructions below.
How do I reset the dock in OS X to default settings?
- open utility Terminal (Terminal type in Spotlight or open Finder> Application> Utilities> Terminal)
- First open the command window type default delete com.apple.com and press Return to execute
- then type the command killall Dock and press the button again Return to restart the dock
After you use the above commands, you will notice that dock of your OS X system was reset to default settings (Settings with which it came immediately after installing the system).
Note: If you uninstall any application on OS X default shortcut originally had in dock, the dock will show a "?" In its place after reset. If you want to reinstall the application click on?, If not simply delete the sign of the dock.
STEALTH SETTINGS - How to restore to default settings dock in OS X