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.
Apple Macintosh systems use ⇧ Shift+⌘ Command+Z for Redo. 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.
Ctrl+Y deleted the current line in the WordStar word processor for CP/M and MS-DOS. In the 1980s, many text editors and word processors mimicked the WordStar command set, making Ctrl+Y a common synonym for "delete line."
- Apple Shortcut Key Standards
- WordStar Reference Card. archive.org. San Rafael, CA: MicroPro. June 1980.
- Yanking - GNU Emacs Manual
- "Archived copy". Archived from the original on 2015-11-27. Retrieved 2015-12-09.