# Why is the CTRL + / not working?

I've learned how to use this shortcut to input fractions in the 2D form, it worked nice on my notebook but I can't make it on my desktop. Any tip on what could be happening?

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Have you checked the default IME? –  xzczd Aug 13 '12 at 10:37
What does "can´t make it on my desktop" mean? –  Yves Klett Aug 13 '12 at 10:53
Please be more specific about both platforms (OS, language settings, keyboard, MMA version). –  Sjoerd C. de Vries Aug 13 '12 at 11:09
@YvesKlett In my keyboard, the / is sometimes behind a baguette –  belisarius Aug 13 '12 at 12:07
@YvesKlett It's a computer running Windows Seven 64Bits. My keyboard is brazilian portuguese. Any more details? –  Vÿska Aug 14 '12 at 5:09

You are not very specific in your details so I have to guess what may be wrong. I can come up with some possibilities:

Keyboard shortcuts redefined
Keyboard shortcuts are defined in the file KeyEventTranslations.tr. This is located in the directory specified by executing either

FileNameJoin[{$InstallationDirectory, "SystemFiles", "FrontEnd", "TextResources",$OperatingSystem}]


or

FileNameJoin[{$UserBaseDirectory, "SystemFiles", "FrontEnd", "TextResources",$OperatingSystem}]


Shortcut definitions in file in the latter directory (if present) override definitions in in the former.

Search for a line that looks like

Item[KeyEvent["/", Modifiers -> {Control}], "Fraction"],


which defines the fraction shortcut. Check whether this contains the "/" character (default) or something different.