What is the difference between pop up and drop down menu?
A pop-up list lets the user choose one option among several and generally displays the option that was last selected. A pull-down list is generally used for selecting commands in a specific context.
What is pull-down menu bar?
A pull-down button displays a menu of items or actions that directly relate to the button's purpose. After people choose an item in a pull-down button's menu, the menu closes, and the app performs the chosen action.