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Is it written ctrl-z or ctrl+z? Moberg (talk) 21:15, 22 July 2011 (UTC)

Both ways, although the "Ctrl+Z" form is newer (probably circa 1990) than the "Ctrl−Z" form (probably circa 1970 or before). Note that Emacs, for example, uses the syntax "C-z" to indicate a control-Z character. I would presume that the use of "+" makes it more obvious (?) that the keys are combined ("added") into a single keystroke combination by pressing them simultaneously. — Loadmaster (talk) 22:22, 25 July 2011 (UTC)

Basic info[edit]

What a confusing text! Shouldn't it be clearly and simply written somewhere that crtl+z on Windows OS serves as reversing tasks? Domusaurea (talk) 02:06, 31 August 2011 (UTC)

I added two sentences about this, OK? Moberg (talk) 10:03, 31 August 2011 (UTC)

Merge into Substitute character?[edit]

This article just doesn't make sense. There's some stuff about Control-Z as a control character, some stuff about it being a keyboard shortcut, etc. It sounds like somebody originally wanted to tie this in to SUB and since then people have tried adding WP:OR and irrelevant stuff about undo commands.

"Strictly speaking, Control+Z is not a printable character but a code for control purposes, though it is sometimes rendered by two characters as ^Z"

This is nonsense. It's not 'strictly speaking' to say that Control-Z is not a printable character. It's just not a printable character, at all. SUB has ^Z as its Caret notation (not its character representation) but that's a product of Control-Z, not a representation of Control-Z itself. One can quite happily have their terminal have Control-Z create a different control character, like ^X, and its all perfectly to the specification.

"In many GUIs and applications Control+Z can be used to undo the latest action [...]"

This entire paragraph screams WP:OR. Also, GUIs and applications? Really?!

"In some operating systems,"


"Control+Z is used to signal an end-of-file, and thus known as the EOF character (more accurately: the EOF control code),"

Am I the only one who finds this sentence hilariously silly? 'A whistle can be used to signal a dog, thus known as a canine (more accurately: Canis lupus familiaris).' Also, SUB isn't EOF by definition so it's just plain wrong.

"when typing at a terminal, terminal emulator, MS-DOS command line, or Win32 console. "

Gee don't forget Powershell, BASH and every other terminal whilst we're at it. And whilst we're there let's pile every form of transmission mechanism known to mankind too.

"On Blogger, a weblog publishing service, the shortcut actually replaces the current version with the one last saved automatically."

Oh dear Gods why...

I propose we clear out all the inaccurate/un-encyclopaedic junk and merge this into SUB. Per WP:MERGE please discuss over at Talk:Substitute_character#Control-Z_Merge. -Rushyo Talk 13:12, 23 November 2012 (UTC