Control-Y

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For some Microsoft Windows computer applications, the key combination Control+Y will redo a previous action that the user chose to undo.[citation needed]

Command+Y usually does not have this meaning in the Apple Macintosh operating system, where Shift+ Command+Z often does it.[citation needed]

For Linux program, it usually does nothing or functions as redo. In many applications, redo is handled by Shift+Control+Z.[citation needed]

In emacs, Control+Y does a paste action (known as "yank").[1] In vi and vim Control+Y scrolls the page up, line by line.[citation needed]

In SAPgui this enters block select mode, allowing the user to select text from a fixed-width text output such as an ABAP report. The mouse cursor turns into a cross-hair and the user can drag it across some text in order to select it (text in reports is not selectable across vertical text lines in SAPGui).[citation needed]

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