Only full-sized Apple keyboards have a key. In
macOS single line
text fields, the key works like it does in
MS-DOS and Windows, going back to the days of
dumb terminals, where Home moves to the start of the line. In multiline
word processors, when the key is pressed, the window scrolls to the top, while the caret position does not change at all; that is, the key is tied to the current window, not the text box being edited. On Apple keyboards that do not have a Home key, one can press for the Home key functionality described above. To get the same result as the Windows platform (that is, moving the insertion point to the beginning of the current line of text), one can press . An application can also be used to change this behavior. ==Linux==