Learn in the textbookGUI Screen Controls, Menus, and Auxiliary Displays
DefinitionA pop-up menu (ポップアップメニュー) is a menu that appears on the spot where you right-click or perform a similar action.
ExplanationOne opened with a right-click lists items suited to whatever you are pointing at, so it is also called a context menu (コンテキストメニュー). The actions you need appear right next to the target, saving you a trip with the mouse to the top of the screen.
AnalogyIt is like a librarian coming over to explain the procedures right where you picked up a book, so you do not have to walk back to the front desk.
Memory hookPop up means to spring up suddenly: like toast jumping out of a toaster, the menu appears right where you are.