appears when the mouse hovers over another control Balloon help Status bar – a graphical control element which poses an information area typically found at the window's bottom Progress bar – a graphical control element used to visualize the progression of an extended computer operation, such as a download, file transfer, or installation Infobar – a graphical control element used by many programs to display non-critical information to a user Container Window – a graphical control element consisting of a visual area containing some of the graphical user interface elements of the program it belongs to Collapsible panel – a panel that can compactly store content which is hidden or revealed by clicking the tab of the widget. Drawer: Side sheets or surfaces containing supplementary content that may be anchored to, pulled out from, or pushed away beyond the left or right edge of the screen. Accordion – a vertically stacked list of items, such as labels or thumbnails where each item can be "expanded" to reveal the associated content Modal window – a graphical control element subordinate to an application's main window which creates a mode where the main window can't be used. Dialog box – a small window that communicates information to the user and prompts for a response Palette window – also known as "Utility window" - a graphical control element which floats on top of all regular windows and offers ready access tools, commands or information for the current application Inspector window – a type of dialog window that shows a list of the current attributes of a selected object and allows these parameters to be changed on the fly Frame – a type of box within which a collection of graphical control elements can be grouped as a way to show relationships visually Canvas – generic drawing element for representing graphical information Cover Flow – an animated, three-dimensional element to visually flipping through snapshots of documents, website bookmarks, album artwork, or photographs. Bubble Flow – an animated, two-dimensional element that allows users to browse and interact the entire tree view of a discussion thread. Carousel (computing) – a graphical widget used to display visual cards in a way that’s quick for users to browse, both on websites and on mobile apps See also Graphical user interface elements Geometric primitive Widget engine for mostly unrelated, physically inspired "widgets" Widget toolkit – a software library which contains