In graphical user interfaces, what are handles?
The term "handle" usually refers to the small black boxes that appear around or on an object, which you can use to size or move the object.
Examples of objects that have handles include drawing elements in Canvas, MacDraw, Excel, or Word; text and graphics boxes in WordPerfect or Word; and axes and labels on Excel charts. In most cases, there will be eight handles: one each for the four corners and the four edges.
The windows in Microsoft Windows are also objects with handles, but the handles do not appear as small black boxes. Rather, the entire length of the edges, and all four corners, can be used to size the window. A thin border appears all around each window for this purpose.
In Mac OS and Mac OS X, the handle to resize a window is the square in its lower right corner. In Mac OS 8 through 9.x, the thin border around and outside of the window is a handle that moves the window, rather than resizing it.
In general, when an object is selected with a mouse, the handles appear. When some other object is selected, the handles will appear on the selected object and disappear from the previously selected object.
Dragging one of the handles will change the shape and/or size of the object. In some applications, dragging a corner handle will preserve the object's aspect ratio, while dragging an edge handle will change it.
Last modified on November 24, 2009.
