The hamburger, sandwich, hotdog, pancake, tribar (or triple bar) double oreo or options button is a button placed typically in a top corner of a graphical user interface. It takes the form of an icon that consists of three parallel horizontal lines (displayed as ☰), suggestive of a list,. The names refer to its resemblance to the layers in a hamburger, a pile of pancakes, or three hotdogs.
Use of this icon as a graphical shortcut originated in order to save space on smaller devices (like smartphones). On devices with even smaller user interfaces, the wider hamburger button may be reduced to three vertically stacked dots (displayed as a tri-colon or vertical ellipsis ⋮ ), from which it may also be described as a kebab. In the Microsoft Office 365 platform, a similar application menu consisting of three rows of three squares is displayed, which is informally described as the waffle by its users.
The icon was originally designed by Norm Cox as part of the user interface for the Xerox Star, introduced in 1981; it saw a resurgence starting in 2009 stemming from the limited screen area available to mobile apps.
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