Modifying the Dock
The dock is a great location to place your most used applications and folders. Below is an example of what the dock on a Mac is:
The different icons on the left side of the dock are "applications." They are, in order from left to right, Finder, Firefox, Safari, System Preferences, Terminal, Chrome, Maps, and iBooks. Then we have two folders and the trash. Your dock will probably have different applications and folders on it.
If you wanted to remove something to the dock you could right click, or hold the Control key while left clicking. Then you would click "Options" and then "Remove from Dock." See the below image for a reference:
Once you have clicked "Remove from Dock" the item will be removed from the dock as long as the application itself is not open on the computer. Take note that you cannot remove Finder or the Trash Bin from the dock. These instructions can also be used to remove a folder from the dock.
Adding an application to the dock is a simple step. First, open the application. Once the application is open you can right click or hold Control while left clicking on the item on the dock. Then you should click "Options" and then "Keep in Dock." There is an example of this with Microsoft Word below:
Now the application will remain on the dock even after it has been closed.
You might want to add a folder to the dock. Oftentimes you might even find the computer has some folders, like Applications and Downloads, already on the dock. Adding a folder to the dock is a simple process. Simply find the folder you wish to add to the dock and click and drag that folder to the space you want it on the dock. This folder will now always be easily accessible for you from anywhere on your computer. Note, this will not change the actual location of the folder, it just acts as a shortcut to the folder itself.