How to Add Icon to Dock
STEP 1. First you have to open a new Finder window then navigate into your applications folder where you will find the icons for every program those are installed on your Mac.
STEP 2. Now simply click and hold the icon of the program until a pop-up menu appears.
STEP 3. From the pop-up menu click on Add to Dock.
How to Remove Icon from Dock
STEP 1. Press CTRL and click the icon of the program until a pop-up menu appears, then from the pop-up menu click on Remove From Dock.
STEP 2. Simply drag the icon to the desktop.
STEP 3. Simply drag the icon ontop of the trash can.
Following the above three ways you can remove icon from the Dock of your Mac. In this way you can add or remove icons to the Dock of your Mac OS X. If you found any difficulty in following the above steps then feel free to ask in the comment section below.