The Dock is a handy place for running programs. However, the Dock will likely also contain icons for programs that you never use, so you may want to remove those icons and replace them with icons of other programs.
In addition, you may want to rearrange the icons on the Dock so similar programs are grouped together, such as grouping all Internet programs in one part of the Dock.
Besides changing the icons that appear on the Dock, you can also rearrange the position of the Dock on the screen or the size of the icons on the Dock itself. Finally, you can store your own files and folders on the Dock to give you one-click access to the files or folders you need most often.
Project goal: Learn to customize the appearance of the Dock.