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Hi I am running TexWorks 0.6.2 on windows 10. In my text editor ( of texworks) whenever I type backslash (\) it is replaced by yen symbol (¥). The code compiles normally and if I copy the code and paste it on notepad or some other editor it shows (\). I was wondering if there is some setup in TexWorks which is causing this issue. I don't have this issue on command prompt or any other editor.

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    the yen symbol is defined as the escape character for japanese implementations of tex. i can't explain how the substitution is made when you use texworks, but it's definitely related to the japanese tex input convention. – barbara beeton Dec 14 '17 at 22:33
  • @barbarabeeton This is not happening in any other editors or programs, it is just in TexWorks. Although it doesn't affect the code any way, but it just looks odd. I have installed TexMaker just to check if the same thing happens but there is no issue with TexMaker. – Prem Dec 14 '17 at 22:39
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    @Prem: Perhaps, when running TeXworks, the keyboard switches to Japanese. If you're not using the Japanese keyboard, you can remove it. – Werner Dec 14 '17 at 22:57
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    Although I can't give you a clear answer without detailed information on TeXworks setting, this seems to be a font glyph issue. Some Japanese Unicode fonts renders U+005C (REVERSE SOLIDUS) as yen sign because 0x5C in SHIFT_JIS corresponds to yen sign. Using an appropriate font in the editor will solve your issue in this case, and I recommend you Source Han Code JP as a typewriter font if you really need to use Japanese characters in your document. – yudai-nkt Dec 14 '17 at 23:32
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    Thanks. U+005C in MS Gothic is displayed as a yen mark, so that was definitely the cause of the problem. – yudai-nkt Dec 15 '17 at 3:25
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Since the OP's problem has been solved through the conversation in comment section, I'll post it as an answer. However, I doubt this question deserves an answer because it is more of a problem of font design than that of TeX/TeXworks and might be off-topic here. If this question should be closed and I shouldn't post an answer, feel free to let me know.

Some Japanese fonts, e.g., MS, Yu, IPA, and Meiryo, render U+005C (REVERSE SOLIDUS) as a yen symbol while yen symbol is assigned to U+00A5 and 0xA5 in Latin-1 encoding. This stems from the fact that the code point 0x5C in Shift_JIS means yen symbol. Developers of the fonts above decided to employ a yen symbol as a glyph for U+005C so that inexperienced users do not get confused with the change in the appearance of the character. Therefore, what the OP considered as a yen symbol is actually a backslash that mimics a yen symbol (ridiculous phrase but I hope you understand the meaning).

So, the solution to the problem is to use a font that renders U+005C as a backslash. Below is a list of monospaced fonts that cover Japanese characters and render U+005C as a backslash. The OP does not need a Japanese font in TeXworks, but I'd like to write down for the sake of completeness. The latter two links are unfortunately available only in Japanese.

  • Source Han Code JP: based on Source Han Sans and Source Code Pro.
  • Migu 1M: based on IPA and M+.
  • Ricty: based on Inconsolata and Migu 1M. You need to run a shell script to create Ricty due to lisence restriction.
  • on or off topic, this explains something that has puzzled me for a very lng time -- why japanese tex input uses a yes sign for the tex escape character. so it's not really a yen sign at all -- it just looks like one! thanks! – barbara beeton Dec 15 '17 at 13:06

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