The example "OS X 10.10 Yosemite - Dock menu" shows usage of menu elements in user interface (UI) design.
"The Dock is located at the bottom of your screen by default. It’s a convenient place to keep items you use frequently. You can add or remove apps and documents, make it larger or smaller, move it to the left or right side of your screen, or even set it to hide when you’re not using it." [support.apple.com/kb/PH18912]
The Mac graphic user interface (GUI) example "OS X 10.10 Yosemite - Dock menu" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mac OS User Interface solution from the Software Development area of ConceptDraw Solution Park.