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Control-Y is a common computer command. It is generated by holding Ctrl and pressing the Y key on most Computer Keyboards.

In most Windows applications this keyboard shortcut functions as Redo, reversing a previous Undo. In some programs such as Microsoft Office it repeats the previous action if it was something other than Undo.[1]

Apple Macintosh systems use ⇧ Shift+⌘ Command+Z for Redo.[2] In general a shortcut on Macintosh using ⌘ Command matches up with a shortcut on Windows using Ctrl, this is one of the most noticeable conflicts.

Many programs (on all systems including Linux) support both Ctrl+Y and Ctrl+⇧ Shift+Z for Redo, due to this conflict. But quite a few remain where only one or the other shortcut works.

Older applicationsEdit

Ctrl+Y deleted the current line in the WordStar word processor for CP/M and MS-DOS.[3] In the 1980s, many text editors and word processors mimicked the WordStar command set, making Ctrl+Y a common synonym for "delete line."

In emacs it does a paste action (known as "yank").[4] Emacs uses Ctrl+/ for Undo and Redo.

In vi and vim it scrolls the display up one line.[citation needed]

In the pico and nano text editors this shortcut scrolls one page up.[5][6]

In SAPgui it enters block-select mode.[citation needed]

ReferencesEdit

See alsoEdit